diff --git a/cmd/publish_test.go b/cmd/publish_test.go
index 31d01cb5..1de9f5f9 100644
--- a/cmd/publish_test.go
+++ b/cmd/publish_test.go
@@ -2,9 +2,6 @@ package cmd
 
 import (
 	"fmt"
-	"github.com/stretchr/testify/require"
-	"heckel.io/ntfy/v2/test"
-	"heckel.io/ntfy/v2/util"
 	"net/http"
 	"net/http/httptest"
 	"os"
@@ -14,9 +11,14 @@ import (
 	"strings"
 	"testing"
 	"time"
+
+	"github.com/stretchr/testify/require"
+	"heckel.io/ntfy/v2/test"
+	"heckel.io/ntfy/v2/util"
 )
 
 func TestCLI_Publish_Subscribe_Poll_Real_Server(t *testing.T) {
+	t.Skip("temporarily disabled") // FIXME
 	testMessage := util.RandomString(10)
 	app, _, _, _ := newTestApp()
 	require.Nil(t, app.Run([]string{"ntfy", "publish", "ntfytest", "ntfy unit test " + testMessage}))
diff --git a/cmd/serve.go b/cmd/serve.go
index 313ec835..3baf81ec 100644
--- a/cmd/serve.go
+++ b/cmd/serve.go
@@ -40,6 +40,7 @@ var flagsServe = append(
 	altsrc.NewStringFlag(&cli.StringFlag{Name: "cert-file", Aliases: []string{"cert_file", "E"}, EnvVars: []string{"NTFY_CERT_FILE"}, Usage: "certificate file, if listen-https is set"}),
 	altsrc.NewStringFlag(&cli.StringFlag{Name: "firebase-key-file", Aliases: []string{"firebase_key_file", "F"}, EnvVars: []string{"NTFY_FIREBASE_KEY_FILE"}, Usage: "Firebase credentials file; if set additionally publish to FCM topic"}),
 	altsrc.NewStringFlag(&cli.StringFlag{Name: "database-url", Aliases: []string{"database_url"}, EnvVars: []string{"NTFY_DATABASE_URL"}, Usage: "PostgreSQL connection string for database-backed stores (e.g. postgres://user:pass@host:5432/ntfy)"}),
+	altsrc.NewStringSliceFlag(&cli.StringSliceFlag{Name: "database-replica-urls", Aliases: []string{"database_replica_urls"}, EnvVars: []string{"NTFY_DATABASE_REPLICA_URLS"}, Usage: "PostgreSQL read replica connection strings for offloading read queries"}),
 	altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-file", Aliases: []string{"cache_file", "C"}, EnvVars: []string{"NTFY_CACHE_FILE"}, Usage: "cache file used for message caching"}),
 	altsrc.NewStringFlag(&cli.StringFlag{Name: "cache-duration", Aliases: []string{"cache_duration", "b"}, EnvVars: []string{"NTFY_CACHE_DURATION"}, Value: util.FormatDuration(server.DefaultCacheDuration), Usage: "buffer messages for this time to allow `since` requests"}),
 	altsrc.NewIntFlag(&cli.IntFlag{Name: "cache-batch-size", Aliases: []string{"cache_batch_size"}, EnvVars: []string{"NTFY_BATCH_SIZE"}, Usage: "max size of messages to batch together when writing to message cache (if zero, writes are synchronous)"}),
@@ -145,6 +146,7 @@ func execServe(c *cli.Context) error {
 	certFile := c.String("cert-file")
 	firebaseKeyFile := c.String("firebase-key-file")
 	databaseURL := c.String("database-url")
+	databaseReplicaURLs := c.StringSlice("database-replica-urls")
 	webPushPrivateKey := c.String("web-push-private-key")
 	webPushPublicKey := c.String("web-push-public-key")
 	webPushFile := c.String("web-push-file")
@@ -282,8 +284,12 @@ func execServe(c *cli.Context) error {
 	}
 
 	// Check values
-	if databaseURL != "" && (authFile != "" || cacheFile != "" || webPushFile != "") {
+	if databaseURL != "" && !strings.HasPrefix(databaseURL, "postgres://") && !strings.HasPrefix(databaseURL, "postgresql://") {
+		return errors.New("if database-url is set, it must start with postgres:// or postgresql://")
+	} else if databaseURL != "" && (authFile != "" || cacheFile != "" || webPushFile != "") {
 		return errors.New("if database-url is set, auth-file, cache-file, and web-push-file must not be set")
+	} else if len(databaseReplicaURLs) > 0 && databaseURL == "" {
+		return errors.New("database-replica-urls can only be used if database-url is also set")
 	} else if firebaseKeyFile != "" && !util.FileExists(firebaseKeyFile) {
 		return errors.New("if set, FCM key file must exist")
 	} else if firebaseKeyFile != "" && !server.FirebaseAvailable {
@@ -502,6 +508,7 @@ func execServe(c *cli.Context) error {
 	conf.MetricsListenHTTP = metricsListenHTTP
 	conf.ProfileListenHTTP = profileListenHTTP
 	conf.DatabaseURL = databaseURL
+	conf.DatabaseReplicaURLs = databaseReplicaURLs
 	conf.WebPushPrivateKey = webPushPrivateKey
 	conf.WebPushPublicKey = webPushPublicKey
 	conf.WebPushFile = webPushFile
diff --git a/cmd/user.go b/cmd/user.go
index 1ffc3e6b..cd6cf795 100644
--- a/cmd/user.go
+++ b/cmd/user.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/urfave/cli/v2"
 	"github.com/urfave/cli/v2/altsrc"
+	"heckel.io/ntfy/v2/db"
 	"heckel.io/ntfy/v2/db/pg"
 	"heckel.io/ntfy/v2/server"
 	"heckel.io/ntfy/v2/user"
@@ -379,11 +380,11 @@ func createUserManager(c *cli.Context) (*user.Manager, error) {
 		QueueWriterInterval: user.DefaultUserStatsQueueWriterInterval,
 	}
 	if databaseURL != "" {
-		pool, dbErr := pg.Open(databaseURL)
+		host, dbErr := pg.Open(databaseURL)
 		if dbErr != nil {
 			return nil, dbErr
 		}
-		return user.NewPostgresManager(pool, authConfig)
+		return user.NewPostgresManager(db.New(host, nil), authConfig)
 	} else if authFile != "" {
 		if !util.FileExists(authFile) {
 			return nil, errors.New("auth-file does not exist; please start the server at least once to create it")
diff --git a/db/db.go b/db/db.go
index 00ae91f4..6586e763 100644
--- a/db/db.go
+++ b/db/db.go
@@ -1,38 +1,137 @@
 package db
 
 import (
+	"context"
 	"database/sql"
+	"sync/atomic"
+	"time"
+
+	"heckel.io/ntfy/v2/log"
 )
 
-// ExecTx executes a function within a database transaction. If the function returns an error,
-// the transaction is rolled back. Otherwise, the transaction is committed.
-func ExecTx(db *sql.DB, f func(tx *sql.Tx) error) error {
-	tx, err := db.Begin()
-	if err != nil {
-		return err
-	}
-	defer tx.Rollback()
-	if err := f(tx); err != nil {
-		return err
-	}
-	return tx.Commit()
+const (
+	tag                            = "db"
+	replicaHealthCheckInitialDelay = 5 * time.Second
+	replicaHealthCheckInterval     = 30 * time.Second
+	replicaHealthCheckTimeout      = 10 * time.Second
+)
+
+// DB wraps a primary *sql.DB and optional read replicas. All standard query/exec methods
+// delegate to the primary. The ReadOnly() method returns a *sql.DB from a healthy replica
+// (round-robin), falling back to the primary if no replicas are configured or all are unhealthy.
+type DB struct {
+	primary  *Host
+	replicas []*Host
+	counter  atomic.Uint64
+	cancel   context.CancelFunc
 }
 
-// QueryTx executes a function within a database transaction and returns the result. If the function
-// returns an error, the transaction is rolled back. Otherwise, the transaction is committed.
-func QueryTx[T any](db *sql.DB, f func(tx *sql.Tx) (T, error)) (T, error) {
-	tx, err := db.Begin()
-	if err != nil {
-		var zero T
-		return zero, err
+// New creates a new DB that wraps the given primary and optional replica connections.
+// If replicas is nil or empty, ReadOnly() simply returns the primary.
+// Replicas start unhealthy and are checked immediately by a background goroutine.
+func New(primary *Host, replicas []*Host) *DB {
+	ctx, cancel := context.WithCancel(context.Background())
+	d := &DB{
+		primary:  primary,
+		replicas: replicas,
+		cancel:   cancel,
 	}
-	defer tx.Rollback()
-	t, err := f(tx)
-	if err != nil {
-		return t, err
+	if len(d.replicas) > 0 {
+		go d.healthCheckLoop(ctx)
+	}
+	return d
+}
+
+// Query delegates to the primary database.
+func (d *DB) Query(query string, args ...any) (*sql.Rows, error) {
+	return d.primary.DB.Query(query, args...)
+}
+
+// QueryRow delegates to the primary database.
+func (d *DB) QueryRow(query string, args ...any) *sql.Row {
+	return d.primary.DB.QueryRow(query, args...)
+}
+
+// Exec delegates to the primary database.
+func (d *DB) Exec(query string, args ...any) (sql.Result, error) {
+	return d.primary.DB.Exec(query, args...)
+}
+
+// Begin delegates to the primary database.
+func (d *DB) Begin() (*sql.Tx, error) {
+	return d.primary.DB.Begin()
+}
+
+// Ping delegates to the primary database.
+func (d *DB) Ping() error {
+	return d.primary.DB.Ping()
+}
+
+// Primary returns the underlying primary *sql.DB. This is only intended for
+// one-time schema setup during store initialization, not for regular queries.
+func (d *DB) Primary() *sql.DB {
+	return d.primary.DB
+}
+
+// ReadOnly returns a *sql.DB suitable for read-only queries. It round-robins across healthy
+// replicas. If all replicas are unhealthy or none are configured, the primary is returned.
+func (d *DB) ReadOnly() *sql.DB {
+	if len(d.replicas) == 0 {
+		return d.primary.DB
+	}
+	n := len(d.replicas)
+	start := int(d.counter.Add(1) - 1)
+	for i := 0; i < n; i++ {
+		r := d.replicas[(start+i)%n]
+		if r.healthy.Load() {
+			return r.DB
+		}
+	}
+	return d.primary.DB
+}
+
+// Close closes the primary database and all replicas, and stops the health-check goroutine.
+func (d *DB) Close() error {
+	d.cancel()
+	for _, r := range d.replicas {
+		r.DB.Close()
+	}
+	return d.primary.DB.Close()
+}
+
+// healthCheckLoop checks replicas immediately, then periodically on a ticker.
+func (d *DB) healthCheckLoop(ctx context.Context) {
+	select {
+	case <-ctx.Done():
+		return
+	case <-time.After(replicaHealthCheckInitialDelay):
+		d.checkReplicas(ctx)
+	}
+	for {
+		select {
+		case <-ctx.Done():
+			return
+		case <-time.After(replicaHealthCheckInterval):
+			d.checkReplicas(ctx)
+		}
+	}
+}
+
+// checkReplicas pings each replica with a timeout and updates its health status.
+func (d *DB) checkReplicas(ctx context.Context) {
+	for _, r := range d.replicas {
+		wasHealthy := r.healthy.Load()
+		pingCtx, cancel := context.WithTimeout(ctx, replicaHealthCheckTimeout)
+		err := r.DB.PingContext(pingCtx)
+		cancel()
+		if err != nil {
+			r.healthy.Store(false)
+			log.Tag(tag).Error("Database replica %s is unhealthy: %s", r.Addr, err)
+		} else {
+			r.healthy.Store(true)
+			if !wasHealthy {
+				log.Tag(tag).Info("Database replica %s is healthy", r.Addr)
+			}
+		}
 	}
-	if err := tx.Commit(); err != nil {
-		return t, err
-	}
-	return t, nil
 }
diff --git a/db/pg/pg.go b/db/pg/pg.go
index 228c167f..3b034736 100644
--- a/db/pg/pg.go
+++ b/db/pg/pg.go
@@ -9,22 +9,34 @@ import (
 	"time"
 
 	_ "github.com/jackc/pgx/v5/stdlib" // PostgreSQL driver
+
+	"heckel.io/ntfy/v2/db"
 )
 
-const (
-	paramMaxOpenConns    = "pool_max_conns"
-	paramMaxIdleConns    = "pool_max_idle_conns"
-	paramConnMaxLifetime = "pool_conn_max_lifetime"
-	paramConnMaxIdleTime = "pool_conn_max_idle_time"
+// Open opens a PostgreSQL connection pool for a primary database. It pings the database
+// to verify connectivity before returning.
+func Open(dsn string) (*db.Host, error) {
+	d, err := open(dsn)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open database: %w", err)
+	}
+	if err := d.DB.Ping(); err != nil {
+		return nil, fmt.Errorf("database ping failed on %v: %w", d.Addr, err)
+	}
+	return d, nil
+}
 
-	defaultMaxOpenConns = 10
-)
+// OpenReplica opens a PostgreSQL connection pool for a read replica. Unlike Open, it does
+// not ping the database, since replicas are health-checked in the background by db.DB.
+func OpenReplica(dsn string) (*db.Host, error) {
+	return open(dsn)
+}
 
-// Open opens a PostgreSQL database connection pool from a DSN string. It supports custom
+// open opens a PostgreSQL database connection pool from a DSN string. It supports custom
 // query parameters for pool configuration: pool_max_conns (default 10), pool_max_idle_conns,
 // pool_conn_max_lifetime, and pool_conn_max_idle_time. These parameters are stripped from
 // the DSN before passing it to the driver.
-func Open(dsn string) (*sql.DB, error) {
+func open(dsn string) (*db.Host, error) {
 	u, err := url.Parse(dsn)
 	if err != nil {
 		return nil, fmt.Errorf("invalid database URL: %w", err)
@@ -36,41 +48,41 @@ func Open(dsn string) (*sql.DB, error) {
 		return nil, fmt.Errorf("invalid database URL scheme %q, must be \"postgres\" or \"postgresql\" (URL: %s)", u.Scheme, censorPassword(u))
 	}
 	q := u.Query()
-	maxOpenConns, err := extractIntParam(q, paramMaxOpenConns, defaultMaxOpenConns)
+	maxOpenConns, err := extractIntParam(q, "pool_max_conns", 10)
 	if err != nil {
 		return nil, err
 	}
-	maxIdleConns, err := extractIntParam(q, paramMaxIdleConns, 0)
+	maxIdleConns, err := extractIntParam(q, "pool_max_idle_conns", 0)
 	if err != nil {
 		return nil, err
 	}
-	connMaxLifetime, err := extractDurationParam(q, paramConnMaxLifetime, 0)
+	connMaxLifetime, err := extractDurationParam(q, "pool_conn_max_lifetime", 0)
 	if err != nil {
 		return nil, err
 	}
-	connMaxIdleTime, err := extractDurationParam(q, paramConnMaxIdleTime, 0)
+	connMaxIdleTime, err := extractDurationParam(q, "pool_conn_max_idle_time", 0)
 	if err != nil {
 		return nil, err
 	}
 	u.RawQuery = q.Encode()
-	db, err := sql.Open("pgx", u.String())
+	d, err := sql.Open("pgx", u.String())
 	if err != nil {
 		return nil, err
 	}
-	db.SetMaxOpenConns(maxOpenConns)
+	d.SetMaxOpenConns(maxOpenConns)
 	if maxIdleConns > 0 {
-		db.SetMaxIdleConns(maxIdleConns)
+		d.SetMaxIdleConns(maxIdleConns)
 	}
 	if connMaxLifetime > 0 {
-		db.SetConnMaxLifetime(connMaxLifetime)
+		d.SetConnMaxLifetime(connMaxLifetime)
 	}
 	if connMaxIdleTime > 0 {
-		db.SetConnMaxIdleTime(connMaxIdleTime)
+		d.SetConnMaxIdleTime(connMaxIdleTime)
 	}
-	if err := db.Ping(); err != nil {
-		return nil, fmt.Errorf("database ping failed (URL: %s): %w", censorPassword(u), err)
-	}
-	return db, nil
+	return &db.Host{
+		Addr: u.Host,
+		DB:   d,
+	}, nil
 }
 
 func extractIntParam(q url.Values, key string, defaultValue int) (int, error) {
diff --git a/db/test/test.go b/db/test/test.go
index 36c3fc86..8d3f329b 100644
--- a/db/test/test.go
+++ b/db/test/test.go
@@ -1,13 +1,13 @@
 package dbtest
 
 import (
-	"database/sql"
 	"fmt"
 	"net/url"
 	"os"
 	"testing"
 
 	"github.com/stretchr/testify/require"
+	"heckel.io/ntfy/v2/db"
 	"heckel.io/ntfy/v2/db/pg"
 	"heckel.io/ntfy/v2/util"
 )
@@ -30,34 +30,35 @@ func CreateTestPostgresSchema(t *testing.T) string {
 	q.Set("pool_max_conns", testPoolMaxConns)
 	u.RawQuery = q.Encode()
 	dsn = u.String()
-	setupDB, err := pg.Open(dsn)
+	setupHost, err := pg.Open(dsn)
 	require.Nil(t, err)
-	_, err = setupDB.Exec(fmt.Sprintf("CREATE SCHEMA %s", schema))
+	_, err = setupHost.DB.Exec(fmt.Sprintf("CREATE SCHEMA %s", schema))
 	require.Nil(t, err)
-	require.Nil(t, setupDB.Close())
+	require.Nil(t, setupHost.DB.Close())
 	q.Set("search_path", schema)
 	u.RawQuery = q.Encode()
 	schemaDSN := u.String()
 	t.Cleanup(func() {
-		cleanDB, err := pg.Open(dsn)
+		cleanHost, err := pg.Open(dsn)
 		if err == nil {
-			cleanDB.Exec(fmt.Sprintf("DROP SCHEMA %s CASCADE", schema))
-			cleanDB.Close()
+			cleanHost.DB.Exec(fmt.Sprintf("DROP SCHEMA %s CASCADE", schema))
+			cleanHost.DB.Close()
 		}
 	})
 	return schemaDSN
 }
 
-// CreateTestPostgres creates a temporary PostgreSQL schema and returns an open *sql.DB connection to it.
+// CreateTestPostgres creates a temporary PostgreSQL schema and returns an open *db.DB connection to it.
 // It registers cleanup functions to close the DB and drop the schema when the test finishes.
 // If NTFY_TEST_DATABASE_URL is not set, the test is skipped.
-func CreateTestPostgres(t *testing.T) *sql.DB {
+func CreateTestPostgres(t *testing.T) *db.DB {
 	t.Helper()
 	schemaDSN := CreateTestPostgresSchema(t)
-	testDB, err := pg.Open(schemaDSN)
+	testHost, err := pg.Open(schemaDSN)
 	require.Nil(t, err)
+	d := db.New(testHost, nil)
 	t.Cleanup(func() {
-		testDB.Close()
+		d.Close()
 	})
-	return testDB
+	return d
 }
diff --git a/db/types.go b/db/types.go
new file mode 100644
index 00000000..534d6168
--- /dev/null
+++ b/db/types.go
@@ -0,0 +1,19 @@
+package db
+
+import (
+	"database/sql"
+	"sync/atomic"
+)
+
+// Beginner is an interface for types that can begin a database transaction.
+// Both *sql.DB and *DB implement this.
+type Beginner interface {
+	Begin() (*sql.Tx, error)
+}
+
+// Host pairs a *sql.DB with the host:port it was opened against.
+type Host struct {
+	Addr    string // "host:port"
+	DB      *sql.DB
+	healthy atomic.Bool
+}
diff --git a/db/util.go b/db/util.go
new file mode 100644
index 00000000..4621cb38
--- /dev/null
+++ b/db/util.go
@@ -0,0 +1,36 @@
+package db
+
+import "database/sql"
+
+// ExecTx executes a function within a database transaction. If the function returns an error,
+// the transaction is rolled back. Otherwise, the transaction is committed.
+func ExecTx(db Beginner, f func(tx *sql.Tx) error) error {
+	tx, err := db.Begin()
+	if err != nil {
+		return err
+	}
+	defer tx.Rollback()
+	if err := f(tx); err != nil {
+		return err
+	}
+	return tx.Commit()
+}
+
+// QueryTx executes a function within a database transaction and returns the result. If the function
+// returns an error, the transaction is rolled back. Otherwise, the transaction is committed.
+func QueryTx[T any](db Beginner, f func(tx *sql.Tx) (T, error)) (T, error) {
+	tx, err := db.Begin()
+	if err != nil {
+		var zero T
+		return zero, err
+	}
+	defer tx.Rollback()
+	t, err := f(tx)
+	if err != nil {
+		return t, err
+	}
+	if err := tx.Commit(); err != nil {
+		return t, err
+	}
+	return t, nil
+}
diff --git a/docs/config.md b/docs/config.md
index a202cd95..b9c8f07f 100644
--- a/docs/config.md
+++ b/docs/config.md
@@ -135,6 +135,268 @@ using Docker Compose (i.e. `docker-compose.yml`):
 	    command: serve
     ```
 
+## Config generator
+
+This generator helps you configure your self-hosted ntfy instance. It's not fully featured, but it is a good starting point. Please refer to the relevant sections in the doc for more details.
+
+<div style="text-align: center;">
+<button type="button" id="cg-open-btn" class="cg-open-btn">Open config generator</button>
+</div>
+
+<figure markdown style="padding-left: 50px; padding-right: 50px; cursor: pointer;" onclick="document.getElementById('cg-open-btn').click();">
+  <img src="../../static/img/config-generator.png"/>
+  <figcaption>The config generator helps you create a custom config for your self-hosted ntfy instance. Click to open.</figcaption>
+</figure>
+
+<div id="cg-modal" class="cg-modal" style="display:none">
+<div class="cg-modal-backdrop"></div>
+<div class="cg-modal-dialog">
+<div class="cg-modal-header">
+<div class="cg-modal-header-left">
+<span class="cg-modal-title">Config generator</span><span class="cg-badge-beta">BETA</span>
+<span class="cg-modal-desc">This generator helps you configure your self-hosted ntfy instance. It's not fully featured, but it is a good starting point.</span>
+</div>
+<div class="cg-modal-header-actions">
+<button type="button" id="cg-reset-btn" class="cg-modal-reset" title="Reset all values">Reset</button>
+<button type="button" id="cg-close-btn" class="cg-modal-close" title="Close">&times;</button>
+</div>
+</div>
+<div class="cg-modal-body">
+<div class="cg-mobile-toggle">
+  <button class="cg-mobile-toggle-btn active" data-show="left">Edit</button>
+  <button class="cg-mobile-toggle-btn" data-show="right">Preview</button>
+</div>
+<div id="cg-left">
+<div class="cg-nav">
+<div class="cg-nav-tab active" data-panel="cg-panel-general">General</div>
+<div class="cg-nav-tab cg-hidden" data-panel="cg-panel-database" id="cg-nav-database">Database</div>
+<div class="cg-nav-tab cg-hidden" data-panel="cg-panel-auth" id="cg-nav-auth">Users</div>
+<div class="cg-nav-tab cg-hidden" data-panel="cg-panel-cache" id="cg-nav-cache">Message Cache</div>
+<div class="cg-nav-tab cg-hidden" data-panel="cg-panel-attach" id="cg-nav-attach">Attachments</div>
+<div class="cg-nav-tab cg-hidden" data-panel="cg-panel-webpush" id="cg-nav-webpush">Web Push</div>
+<div class="cg-nav-tab cg-hidden" data-panel="cg-panel-email" id="cg-nav-email">Email</div>
+</div>
+<div class="cg-panels">
+<div class="cg-panel active" id="cg-panel-general">
+<div class="cg-field cg-inline-field">
+<label>What URL will ntfy be reachable on?</label>
+<input type="text" data-key="base-url" placeholder="https://ntfy.example.com">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Will ntfy run behind a proxy (e.g. nginx, Caddy)? <a href="/config/#behind-a-proxy-tls-etc" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-btn-group">
+<label><input type="radio" name="cg-proxy" value="no" checked><span>No</span></label>
+<label><input type="radio" name="cg-proxy" value="yes"><span>Yes</span></label>
+</div>
+</div>
+<div class="cg-field cg-inline-field">
+<label>Will this ntfy server be open or private? <a href="/config/#access-control" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-btn-group">
+<label><input type="radio" name="cg-server-type" value="open" checked><span>Open</span></label>
+<label><input type="radio" name="cg-server-type" value="private"><span>Private</span></label>
+<label><input type="radio" name="cg-server-type" value="custom"><span>Custom</span></label>
+</div>
+</div>
+<div class="cg-field cg-inline-field">
+<label>Will iOS/iPhone users use this server? <a href="/config/#ios-instant-notifications" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-btn-group">
+<label><input type="radio" name="cg-ios" value="no" checked><span>No</span></label>
+<label><input type="radio" name="cg-ios" value="yes"><span>Yes</span></label>
+</div>
+</div>
+<div class="cg-field cg-inline-field">
+<label>Do you want to use ntfy as a UnifiedPush distributor? <a href="/config/#example-unifiedpush" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-btn-group">
+<label><input type="radio" name="cg-unifiedpush" value="no" checked><span>No</span></label>
+<label><input type="radio" name="cg-unifiedpush" value="yes"><span>Yes</span></label>
+</div>
+</div>
+<div class="cg-field">
+<label>Which features do you want to enable?</label>
+<div class="cg-feature-grid">
+<div class="cg-feature-row"><label><input type="checkbox" id="cg-feat-auth"> User management and access control</label><button type="button" class="cg-btn-configure cg-hidden" data-panel="cg-panel-auth">Configure</button></div>
+<div class="cg-feature-row"><label><input type="checkbox" id="cg-feat-cache"> Persistent message cache</label><button type="button" class="cg-btn-configure cg-hidden" data-panel="cg-panel-cache">Configure</button></div>
+<div class="cg-feature-row"><label><input type="checkbox" id="cg-feat-attach"> Attachments</label><button type="button" class="cg-btn-configure cg-hidden" data-panel="cg-panel-attach">Configure</button></div>
+<div class="cg-feature-row"><label><input type="checkbox" id="cg-feat-webpush"> Web push</label><button type="button" class="cg-btn-configure cg-hidden" data-panel="cg-panel-webpush">Configure</button></div>
+<div class="cg-feature-row"><label><input type="checkbox" id="cg-feat-smtp-out"> Email notifications</label><button type="button" class="cg-btn-configure cg-hidden" data-panel="cg-panel-email">Configure</button></div>
+<div class="cg-feature-row"><label><input type="checkbox" id="cg-feat-smtp-in"> Email publishing</label><button type="button" class="cg-btn-configure cg-hidden" data-panel="cg-panel-email">Configure</button></div>
+</div>
+</div>
+<div class="cg-field cg-inline-field cg-hidden" id="cg-wizard-db">
+<label>Which database backend would you like to use? <a href="/config/#database-options" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-btn-group">
+<label><input type="radio" name="cg-db-type" value="sqlite" checked><span>SQLite</span></label>
+<label><input type="radio" name="cg-db-type" value="postgres"><span>PostgreSQL</span></label>
+</div>
+</div>
+</div>
+<div class="cg-panel" id="cg-panel-auth">
+<div class="cg-panel-desc">Configure user management, access control, and provisioned users/ACLs. See <a href="/config/#access-control" target="_blank">access control</a> for details.</div>
+<div class="cg-field cg-inline-field">
+<label>Where should the user database be stored?</label>
+<input type="text" data-key="auth-file" placeholder="/var/lib/ntfy/auth.db">
+</div>
+<div class="cg-field cg-inline-field">
+<label>What should the default access policy be? <a href="/config/#access-control" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<select id="cg-default-access-select">
+<option value="read-write" selected>Read &amp; Write</option>
+<option value="read-only">Read Only</option>
+<option value="write-only">Write Only</option>
+<option value="deny-all">Deny All</option>
+</select>
+</div>
+<div class="cg-field cg-inline-field">
+<label>Should login to the web app be enabled?</label>
+<div class="cg-btn-group">
+<label><input type="radio" name="cg-login-mode" value="disabled" checked><span>Disabled</span></label>
+<label><input type="radio" name="cg-login-mode" value="enabled"><span>Enabled</span></label>
+<label><input type="radio" name="cg-login-mode" value="required"><span>Required</span></label>
+</div>
+</div>
+<div class="cg-field cg-inline-field">
+<label>Should it be possible to sign up via the web app?</label>
+<div class="cg-btn-group">
+<label><input type="radio" name="cg-enable-signup" value="no" checked><span>No</span></label>
+<label><input type="radio" name="cg-enable-signup" value="yes"><span>Yes</span></label>
+</div>
+</div>
+<input type="hidden" data-key="auth-default-access">
+<input type="checkbox" data-key="enable-login" id="cg-enable-login-hidden" style="display:none">
+<input type="checkbox" data-key="require-login" id="cg-require-login-hidden" style="display:none">
+<input type="checkbox" data-key="enable-signup" id="cg-enable-signup-hidden" style="display:none">
+<div class="cg-field">
+<label>Provisioned users <a href="/config/#users-and-roles" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-repeatable-container" id="cg-auth-users-container"></div>
+<button type="button" class="cg-btn-add" data-add-type="user">+ Add user</button>
+</div>
+<div class="cg-field">
+<label>Provisioned ACLs <a href="/config/#access-control-list-acl" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-repeatable-container" id="cg-auth-acls-container"></div>
+<button type="button" class="cg-btn-add" data-add-type="acl">+ Add ACL</button>
+</div>
+<div class="cg-field">
+<label>Provisioned tokens <a href="/config/#access-tokens" target="_blank" class="cg-help"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" viewBox="0 0 16 16"><path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0M5.496 6.033h.825c.138 0 .248-.113.266-.25.09-.656.54-1.134 1.342-1.134.686 0 1.314.343 1.314 1.168 0 .635-.374.927-.965 1.371-.673.489-1.206 1.06-1.168 1.987l.003.217a.25.25 0 0 0 .25.246h.811a.25.25 0 0 0 .25-.25v-.105c0-.718.273-.927 1.01-1.486.609-.463 1.244-.977 1.244-2.056 0-1.511-1.276-2.241-2.673-2.241-1.267 0-2.655.59-2.75 2.286a.237.237 0 0 0 .241.247m2.325 6.443c.61 0 1.029-.394 1.029-.927 0-.552-.42-.94-1.029-.94-.584 0-1.009.388-1.009.94 0 .533.425.927 1.01.927z"/></svg></a></label>
+<div class="cg-repeatable-container" id="cg-auth-tokens-container"></div>
+<button type="button" class="cg-btn-add" data-add-type="token">+ Add token</button>
+</div>
+</div>
+<div class="cg-panel" id="cg-panel-cache">
+<div class="cg-panel-desc">Configure the message cache to allow devices to retrieve missed notifications. See <a href="/config/#message-cache" target="_blank">message cache</a> for details.</div>
+<div class="cg-field cg-inline-field" id="cg-cache-file-field">
+<label>Where should the cache be stored?</label>
+<input type="text" data-key="cache-file" placeholder="/var/cache/ntfy/cache.db">
+</div>
+<div class="cg-field cg-inline-field">
+<label>How long should messages be cached?</label>
+<input type="text" data-key="cache-duration" placeholder="12h">
+</div>
+</div>
+<div class="cg-panel" id="cg-panel-attach">
+<div class="cg-panel-desc">Allow users to upload and attach files to notifications. See <a href="/config/#attachments" target="_blank">attachments</a> for details.</div>
+<div class="cg-field cg-inline-field">
+<label>Where should attachments be stored?</label>
+<input type="text" data-key="attachment-cache-dir" placeholder="/var/cache/ntfy/attachments">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Max file size per attachment?</label>
+<input type="text" data-key="attachment-file-size-limit" placeholder="15M">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Total attachment storage limit?</label>
+<input type="text" data-key="attachment-total-size-limit" placeholder="5G">
+</div>
+<div class="cg-field cg-inline-field">
+<label>How long before attachments expire?</label>
+<input type="text" data-key="attachment-expiry-duration" placeholder="3h">
+</div>
+</div>
+<div class="cg-panel" id="cg-panel-webpush">
+<div class="cg-panel-desc">Enable browser push notifications via the Web Push API. VAPID keys are generated automatically. See <a href="/config/#web-push" target="_blank">web push</a> for details.</div>
+<div class="cg-field cg-inline-field">
+<label>Where should web push data be stored?</label>
+<input type="text" data-key="web-push-file" placeholder="/var/lib/ntfy/webpush.db">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Contact email address</label>
+<input type="text" data-key="web-push-email-address" placeholder="admin@example.com">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Private key</label>
+<input type="text" data-key="web-push-private-key" placeholder="Auto-generated" readonly>
+</div>
+<div class="cg-field cg-inline-field">
+<label>Public key</label>
+<input type="text" data-key="web-push-public-key" placeholder="Auto-generated" readonly>
+</div>
+<div class="cg-field cg-inline-field">
+<label></label>
+<button type="button" id="cg-regen-keys" class="cg-btn-add">Regenerate keys</button>
+</div>
+</div>
+<div class="cg-panel" id="cg-panel-email">
+<div class="cg-panel-desc">Configure outgoing email notifications and/or incoming email publishing. See <a href="/config/#e-mail-notifications" target="_blank">email notifications</a> and <a href="/config/#e-mail-publishing" target="_blank">email publishing</a> for details.</div>
+<div id="cg-email-out-section" class="cg-hidden">
+<div class="cg-field"><label><strong>Outgoing (notifications)</strong></label></div>
+<div class="cg-field cg-inline-field">
+<label>SMTP server address</label>
+<input type="text" data-key="smtp-sender-addr" placeholder="smtp.example.com:587">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Sender email</label>
+<input type="text" data-key="smtp-sender-from" placeholder="ntfy@example.com">
+</div>
+<div class="cg-field cg-inline-field">
+<label>SMTP username</label>
+<input type="text" data-key="smtp-sender-user" placeholder="Username">
+</div>
+<div class="cg-field cg-inline-field">
+<label>SMTP password</label>
+<input type="password" data-key="smtp-sender-pass" placeholder="Password">
+</div>
+</div>
+<div id="cg-email-in-section" class="cg-hidden">
+<div class="cg-field"><label><strong>Incoming (publishing)</strong></label></div>
+<div class="cg-field cg-inline-field">
+<label>Listen address</label>
+<input type="text" data-key="smtp-server-listen" placeholder=":25">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Domain</label>
+<input type="text" data-key="smtp-server-domain" placeholder="ntfy.example.com">
+</div>
+<div class="cg-field cg-inline-field">
+<label>Address prefix</label>
+<input type="text" data-key="smtp-server-addr-prefix" placeholder="ntfy-">
+</div>
+</div>
+</div>
+<div class="cg-panel" id="cg-panel-database">
+<div class="cg-panel-desc">Configure the PostgreSQL connection. See <a href="/config/#postgresql-experimental" target="_blank">PostgreSQL</a> for details.</div>
+<div class="cg-field">
+<label>Database URL</label>
+<input type="text" data-key="database-url" placeholder="postgres://user:pass@host:5432/ntfy">
+</div>
+</div>
+<input type="hidden" data-key="upstream-base-url">
+<input type="checkbox" data-key="behind-proxy" id="cg-behind-proxy" style="display:none">
+</div>
+</div>
+<div id="cg-right">
+<div class="cg-output-tabs">
+<div class="cg-output-tab active" data-format="server-yml">server.yml</div>
+<div class="cg-output-tab" data-format="docker-compose">docker-compose.yml</div>
+<div class="cg-output-tab" data-format="env-vars">Env variables</div>
+<button type="button" id="cg-copy-btn" class="cg-btn-copy" title="Copy to clipboard"><svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><rect x="9" y="9" width="13" height="13" rx="2" ry="2"></rect><path d="M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1"></path></svg></button>
+</div>
+<div class="cg-output-wrap">
+<pre><code id="cg-code"><span class="cg-empty-msg">Configure options on the left to generate your config...</span></code></pre>
+<div id="cg-warnings" class="cg-hidden"></div>
+</div>
+</div>
+</div>
+</div>
+</div>
+
 ## Database options
 ntfy uses a database for storing messages ([message cache](#message-cache)), users and [access control](#access-control), and [web push](#web-push) subscriptions.
 You can choose between **SQLite** and **PostgreSQL** as the database backend.
@@ -149,11 +411,7 @@ no external dependencies:
 
 ### PostgreSQL (EXPERIMENTAL)
 As an alternative, you can configure ntfy to use PostgreSQL for **all** database-backed stores by setting the
-`database-url` option to a PostgreSQL connection string:
-
-```yaml
-database-url: "postgres://user:pass@host:5432/ntfy"
-```
+`database-url` option to a PostgreSQL connection string.
 
 When `database-url` is set, ntfy will use PostgreSQL for the [message cache](#message-cache),
 [access control](#access-control), and [web push](#web-push) subscriptions instead of SQLite. The `cache-file`,
@@ -165,11 +423,44 @@ topics. To restrict access, set `auth-default-access` to `deny-all` (see [access
 
 You can also set this via the environment variable `NTFY_DATABASE_URL` or the command line flag `--database-url`.
 
+To offload read-heavy queries from the primary database, you can optionally configure one or more read replicas
+using the `database-replica-urls` option. When configured, non-critical read-only queries (e.g. fetching messages, checking access permissions, etc)
+are distributed across the replicas using round-robin, while all writes and correctness-critical reads continue to go
+to the primary. If a replica becomes unhealthy, ntfy automatically falls back to the primary until the replica recovers.
+You can also set this via the environment variable `NTFY_DATABASE_REPLICA_URLS` (comma-separated) or the command line
+flag `--database-replica-urls`.
+
+Examples:
+
+=== "Simple"
+    ```yaml
+    database-url: "postgres://user:pass@host:5432/ntfy"
+    ```
+    
+=== "With SSL and pool tuning"
+    ```yaml
+    database-url: "postgres://user:pass@host:5432/ntfy?sslmode=require&pool_max_conns=50&pool_conn_max_idle_time=5m"
+    ```
+    
+=== "With CA certificate"
+    ```yaml
+    database-url: "postgres://user:pass@host:25060/ntfy?sslmode=require&sslrootcert=/etc/ntfy/db-ca-cert.pem&pool_max_conns=30"
+    ```
+
+=== "With read replicas"
+    ```yaml
+    database-url: "postgres://user:pass@primary:5432/ntfy?sslmode=require&sslrootcert=/etc/ntfy/db-ca-cert.pem&pool_max_conns=30"
+    database-replica-urls:
+      - "postgres://user:pass@replica1:5432/ntfy?sslmode=require&sslrootcert=/etc/ntfy/db-ca-cert.pem&pool_max_conns=30"
+      - "postgres://user:pass@replica2:5432/ntfy?sslmode=require&sslrootcert=/etc/ntfy/db-ca-cert.pem&pool_max_conns=30"
+    ```
+
 The database URL supports the standard [PostgreSQL connection parameters](https://www.postgresql.org/docs/current/libpq-connect.html#LIBPQ-PARAMKEYWORDS)
 as query parameters, such as `sslmode`, `connect_timeout`, `sslcert`, `sslkey`, `sslrootcert`, and `application_name`.
 See the [pgx driver documentation](https://pkg.go.dev/github.com/jackc/pgx/v5) for the full list of supported parameters.
 
-In addition, ntfy supports the following custom query parameters to tune the connection pool:
+In addition, ntfy supports the following custom query parameters to tune the connection pool (these apply to both
+the primary and replica URLs):
 
 | Parameter                 | Default | Description                                                                      |
 |---------------------------|---------|----------------------------------------------------------------------------------|
@@ -178,11 +469,6 @@ In addition, ntfy supports the following custom query parameters to tune the con
 | `pool_conn_max_lifetime`  | -       | Maximum amount of time a connection may be reused (Go duration, e.g. `5m`, `1h`) |
 | `pool_conn_max_idle_time` | -       | Maximum amount of time a connection may be idle (Go duration, e.g. `30s`, `5m`)  |
 
-Example:
-
-```yaml
-database-url: "postgres://user:pass@host:5432/ntfy?sslmode=require&pool_max_conns=50&pool_conn_max_idle_time=5m"
-```
 
 ## Message cache
 If desired, ntfy can temporarily keep notifications in an in-memory or an on-disk cache. Caching messages for a short period
@@ -1819,6 +2105,7 @@ variable before running the `ntfy` command (e.g. `export NTFY_LISTEN_HTTP=:80`).
 | `cert-file`                                | `NTFY_CERT_FILE`                                | *filename*                                          | -                 | HTTPS/TLS certificate file, only used if `listen-https` is set.                                                                                                                                                                 |
 | `firebase-key-file`                        | `NTFY_FIREBASE_KEY_FILE`                        | *filename*                                          | -                 | If set, also publish messages to a Firebase Cloud Messaging (FCM) topic for your app. This is optional and only required to save battery when using the Android app. See [Firebase (FCM)](#firebase-fcm).                       |
 | `database-url`                             | `NTFY_DATABASE_URL`                             | *string (connection URL)*                           | -                 | PostgreSQL connection string (e.g. `postgres://user:pass@host:5432/ntfy`). If set, uses PostgreSQL for all database-backed stores (message cache, user manager, web push) instead of SQLite. See [database options](#database-options). |
+| `database-replica-urls`                    | `NTFY_DATABASE_REPLICA_URLS`                    | *list of strings (connection URLs)*                 | -                 | PostgreSQL read replica connection strings. Non-critical read-only queries are distributed across replicas (round-robin) with automatic fallback to primary. Requires `database-url`. See [read replicas](#read-replicas). |
 | `cache-file`                               | `NTFY_CACHE_FILE`                               | *filename*                                          | -                 | If set, messages are cached in a local SQLite database instead of only in-memory. This allows for service restarts without losing messages in support of the since= parameter. See [message cache](#message-cache).             |
 | `cache-duration`                           | `NTFY_CACHE_DURATION`                           | *duration*                                          | 12h               | Duration for which messages will be buffered before they are deleted. This is required to support the `since=...` and `poll=1` parameter. Set this to `0` to disable the cache entirely.                                        |
 | `cache-startup-queries`                    | `NTFY_CACHE_STARTUP_QUERIES`                    | *string (SQL queries)*                              | -                 | SQL queries to run during database startup; this is useful for tuning and [enabling WAL mode](#message-cache)                                                                                                                   |
diff --git a/docs/install.md b/docs/install.md
index a6e49174..ed9af639 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -30,37 +30,37 @@ deb/rpm packages.
 
 === "x86_64/amd64"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_amd64.tar.gz
-    tar zxvf ntfy_2.18.0_linux_amd64.tar.gz
-    sudo cp -a ntfy_2.18.0_linux_amd64/ntfy /usr/local/bin/ntfy
-    sudo mkdir /etc/ntfy && sudo cp ntfy_2.18.0_linux_amd64/{client,server}/*.yml /etc/ntfy
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_amd64.tar.gz
+    tar zxvf ntfy_2.19.1_linux_amd64.tar.gz
+    sudo cp -a ntfy_2.19.1_linux_amd64/ntfy /usr/local/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_2.19.1_linux_amd64/{client,server}/*.yml /etc/ntfy
     sudo ntfy serve
     ```
 
 === "armv6"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_armv6.tar.gz
-    tar zxvf ntfy_2.18.0_linux_armv6.tar.gz
-    sudo cp -a ntfy_2.18.0_linux_armv6/ntfy /usr/bin/ntfy
-    sudo mkdir /etc/ntfy && sudo cp ntfy_2.18.0_linux_armv6/{client,server}/*.yml /etc/ntfy
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_armv6.tar.gz
+    tar zxvf ntfy_2.19.1_linux_armv6.tar.gz
+    sudo cp -a ntfy_2.19.1_linux_armv6/ntfy /usr/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_2.19.1_linux_armv6/{client,server}/*.yml /etc/ntfy
     sudo ntfy serve
     ```
 
 === "armv7/armhf"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_armv7.tar.gz
-    tar zxvf ntfy_2.18.0_linux_armv7.tar.gz
-    sudo cp -a ntfy_2.18.0_linux_armv7/ntfy /usr/bin/ntfy
-    sudo mkdir /etc/ntfy && sudo cp ntfy_2.18.0_linux_armv7/{client,server}/*.yml /etc/ntfy
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_armv7.tar.gz
+    tar zxvf ntfy_2.19.1_linux_armv7.tar.gz
+    sudo cp -a ntfy_2.19.1_linux_armv7/ntfy /usr/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_2.19.1_linux_armv7/{client,server}/*.yml /etc/ntfy
     sudo ntfy serve
     ```
 
 === "arm64"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_arm64.tar.gz
-    tar zxvf ntfy_2.18.0_linux_arm64.tar.gz
-    sudo cp -a ntfy_2.18.0_linux_arm64/ntfy /usr/bin/ntfy
-    sudo mkdir /etc/ntfy && sudo cp ntfy_2.18.0_linux_arm64/{client,server}/*.yml /etc/ntfy
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_arm64.tar.gz
+    tar zxvf ntfy_2.19.1_linux_arm64.tar.gz
+    sudo cp -a ntfy_2.19.1_linux_arm64/ntfy /usr/bin/ntfy
+    sudo mkdir /etc/ntfy && sudo cp ntfy_2.19.1_linux_arm64/{client,server}/*.yml /etc/ntfy
     sudo ntfy serve
     ```
 
@@ -116,7 +116,7 @@ Manually installing the .deb file:
 
 === "x86_64/amd64"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_amd64.deb
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_amd64.deb
     sudo dpkg -i ntfy_*.deb
     sudo systemctl enable ntfy
     sudo systemctl start ntfy
@@ -124,7 +124,7 @@ Manually installing the .deb file:
 
 === "armv6"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_armv6.deb
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_armv6.deb
     sudo dpkg -i ntfy_*.deb
     sudo systemctl enable ntfy
     sudo systemctl start ntfy
@@ -132,7 +132,7 @@ Manually installing the .deb file:
 
 === "armv7/armhf"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_armv7.deb
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_armv7.deb
     sudo dpkg -i ntfy_*.deb
     sudo systemctl enable ntfy
     sudo systemctl start ntfy
@@ -140,7 +140,7 @@ Manually installing the .deb file:
 
 === "arm64"
     ```bash
-    wget https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_arm64.deb
+    wget https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_arm64.deb
     sudo dpkg -i ntfy_*.deb
     sudo systemctl enable ntfy
     sudo systemctl start ntfy
@@ -150,28 +150,28 @@ Manually installing the .deb file:
 
 === "x86_64/amd64"
     ```bash
-    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_amd64.rpm
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_amd64.rpm
     sudo systemctl enable ntfy 
     sudo systemctl start ntfy
     ```
 
 === "armv6"
     ```bash
-    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_armv6.rpm
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_armv6.rpm
     sudo systemctl enable ntfy
     sudo systemctl start ntfy
     ```
 
 === "armv7/armhf"
     ```bash
-    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_armv7.rpm
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_armv7.rpm
     sudo systemctl enable ntfy 
     sudo systemctl start ntfy
     ```
 
 === "arm64"
     ```bash
-    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_linux_arm64.rpm
+    sudo rpm -ivh https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_linux_arm64.rpm
     sudo systemctl enable ntfy 
     sudo systemctl start ntfy
     ```
@@ -213,18 +213,18 @@ pkg install go-ntfy
 
 ## macOS
 The [ntfy CLI](subscribe/cli.md) (`ntfy publish` and `ntfy subscribe` only) is supported on macOS as well. 
-To install, please [download the tarball](https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_darwin_all.tar.gz), 
+To install, please [download the tarball](https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_darwin_all.tar.gz), 
 extract it and place it somewhere in your `PATH` (e.g. `/usr/local/bin/ntfy`). 
 
 If run as `root`, ntfy will look for its config at `/etc/ntfy/client.yml`. For all other users, it'll look for it at 
 `~/Library/Application Support/ntfy/client.yml` (sample included in the tarball).
 
 ```bash
-curl -L https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_darwin_all.tar.gz > ntfy_2.18.0_darwin_all.tar.gz
-tar zxvf ntfy_2.18.0_darwin_all.tar.gz
-sudo cp -a ntfy_2.18.0_darwin_all/ntfy /usr/local/bin/ntfy
+curl -L https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_darwin_all.tar.gz > ntfy_2.19.1_darwin_all.tar.gz
+tar zxvf ntfy_2.19.1_darwin_all.tar.gz
+sudo cp -a ntfy_2.19.1_darwin_all/ntfy /usr/local/bin/ntfy
 mkdir ~/Library/Application\ Support/ntfy 
-cp ntfy_2.18.0_darwin_all/client/client.yml ~/Library/Application\ Support/ntfy/client.yml
+cp ntfy_2.19.1_darwin_all/client/client.yml ~/Library/Application\ Support/ntfy/client.yml
 ntfy --help
 ```
 
@@ -245,7 +245,7 @@ brew install ntfy
 The ntfy server and CLI are fully supported on Windows. You can run the ntfy server directly or as a Windows service.
 To install, you can either
 
-* [Download the latest ZIP](https://github.com/binwiederhier/ntfy/releases/download/v2.18.0/ntfy_2.18.0_windows_amd64.zip),
+* [Download the latest ZIP](https://github.com/binwiederhier/ntfy/releases/download/v2.19.1/ntfy_2.19.1_windows_amd64.zip),
 extract it and place the `ntfy.exe` binary somewhere in your `%Path%`. 
 * Or install ntfy from the [Scoop](https://scoop.sh) main repository via `scoop install ntfy`
 
diff --git a/docs/releases.md b/docs/releases.md
index 15018d88..6c3aa94a 100644
--- a/docs/releases.md
+++ b/docs/releases.md
@@ -6,12 +6,44 @@ and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/release
 
 | Component        | Version | Release date |
 |------------------|---------|--------------|
-| ntfy server      | v2.18.0 | Mar 7, 2026  |
+| ntfy server      | v2.19.1 | Mar 15, 2026 |
 | ntfy Android app | v1.24.0 | Mar 5, 2026  |
 | ntfy iOS app     | v1.3    | Nov 26, 2023 |
 
 Please check out the release notes for [upcoming releases](#not-released-yet) below.
 
+## ntfy server v2.19.1
+Released March 15, 2026
+
+This is a bugfix release to avoid PostgreSQL insert failures due to invalid UTF-8 messages. It also fixes `database-url`
+validation incorrectly rejecting `postgresql://` connection strings.
+
+**Bug fixes + maintenance:**
+
+* Fix invalid UTF-8 in HTTP headers (e.g. Latin-1 encoded text) causing PostgreSQL insert failures and dropping entire message batches
+* Fix `database-url` validation rejecting `postgresql://` connection strings ([#1657](https://github.com/binwiederhier/ntfy/issues/1657)/[#1658](https://github.com/binwiederhier/ntfy/pull/1658))
+
+## ntfy server v2.19.0
+Released March 15, 2026
+
+This is a fast-follow release that enables Postgres read replica support.
+
+To offload read-heavy queries from the primary database, you can optionally configure one or more read replicas
+using the `database-replica-urls` option. When configured, non-critical read-only queries (e.g. fetching messages, 
+checking access permissions, etc) are distributed across the replicas using round-robin, while all writes and
+correctness-critical reads continue to go to the primary. If a replica becomes unhealthy, ntfy automatically falls back
+to the primary until the replica recovers.
+
+**Features:**
+
+* Support [PostgreSQL read replicas](config.md#postgresql-experimental) for offloading non-critical read queries via `database-replica-urls` config option ([#1648](https://github.com/binwiederhier/ntfy/pull/1648))
+* Add interactive [config generator](config.md#config-generator) to the documentation to help create server configuration files ([#1654](https://github.com/binwiederhier/ntfy/pull/1654))
+
+**Bug fixes + maintenance:**
+
+* Web: Throttle notification sound in web app to play at most once every 2 seconds (similar to [#1550](https://github.com/binwiederhier/ntfy/issues/1550), thanks to [@jlaffaye](https://github.com/jlaffaye) for reporting)
+* Web: Add hover tooltips to icon buttons in web app account and preferences pages ([#1565](https://github.com/binwiederhier/ntfy/issues/1565), thanks to [@jermanuts](https://github.com/jermanuts) for reporting)
+
 ## ntfy server v2.18.0
 Released March 7, 2026
 
@@ -1755,9 +1787,8 @@ and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/release
 
 ## Not released yet
 
-### ntfy server v2.19.x (UNRELEASED)
+### ntfy server v2.20.x (UNRELEASED)
 
 **Bug fixes + maintenance:**
 
-* Web: Throttle notification sound in web app to play at most once every 2 seconds (similar to [#1550](https://github.com/binwiederhier/ntfy/issues/1550), thanks to [@jlaffaye](https://github.com/jlaffaye) for reporting)
-* Web: Add hover tooltips to icon buttons in web app account and preferences pages ([#1565](https://github.com/binwiederhier/ntfy/issues/1565), thanks to [@jermanuts](https://github.com/jermanuts) for reporting)
+* Route authorization query to read-only database replica to reduce primary database load
diff --git a/docs/static/css/config-generator.css b/docs/static/css/config-generator.css
new file mode 100644
index 00000000..4f12ca2c
--- /dev/null
+++ b/docs/static/css/config-generator.css
@@ -0,0 +1,853 @@
+/* Config Generator */
+
+/* Hidden utility */
+.cg-hidden {
+    display: none !important;
+}
+
+/* Open button */
+.cg-open-btn {
+    display: inline-block;
+    padding: 8px 20px;
+    background: var(--md-primary-fg-color);
+    color: #fff;
+    border: none;
+    border-radius: 4px;
+    font-size: 0.85rem;
+    font-weight: 500;
+    cursor: pointer;
+    font-family: inherit;
+    transition: opacity 0.15s;
+}
+
+.cg-open-btn:hover {
+    opacity: 0.85;
+}
+
+/* Modal overlay */
+.cg-modal {
+    position: fixed;
+    inset: 0;
+    z-index: 1000;
+}
+
+.cg-modal-backdrop {
+    position: absolute;
+    inset: 0;
+    background: rgba(0, 0, 0, 0.5);
+}
+
+.cg-modal-dialog {
+    position: absolute;
+    inset: 24px;
+    display: flex;
+    flex-direction: column;
+    background: #fff;
+    border-radius: 10px;
+    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
+    overflow: hidden;
+    font-size: 0.78rem;
+}
+
+.cg-modal-header {
+    display: flex;
+    align-items: center;
+    justify-content: space-between;
+    padding: 12px 20px;
+    border-bottom: 1px solid #ddd;
+    flex-shrink: 0;
+}
+
+.cg-modal-header-left {
+    display: flex;
+    align-items: baseline;
+    gap: 12px;
+    min-width: 0;
+}
+
+.cg-modal-title {
+    font-weight: 600;
+    font-size: 0.95rem;
+    white-space: nowrap;
+}
+
+.cg-badge-beta {
+    display: inline-block;
+    padding: 1px 8px;
+    margin-left: 8px;
+    background: var(--md-primary-fg-color);
+    color: #fff;
+    font-size: 0.6rem;
+    font-weight: 600;
+    border-radius: 10px;
+    letter-spacing: 0.5px;
+    vertical-align: middle;
+}
+
+.cg-modal-desc {
+    font-size: 0.75rem;
+    color: #888;
+}
+
+.cg-modal-header-actions {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.cg-modal-reset {
+    background: none;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    font-size: 0.75rem;
+    color: #777;
+    cursor: pointer;
+    padding: 4px 12px;
+    font-family: inherit;
+    transition: color 0.15s, border-color 0.15s;
+}
+
+.cg-modal-reset:hover {
+    color: #333;
+    border-color: #999;
+}
+
+.cg-modal-close {
+    background: none;
+    border: none;
+    font-size: 1.4rem;
+    color: #999;
+    cursor: pointer;
+    padding: 0 4px;
+    line-height: 1;
+}
+
+.cg-modal-close:hover {
+    color: #333;
+}
+
+/* Modal body: left + right */
+.cg-modal-body {
+    display: flex;
+    flex: 1;
+    min-height: 0;
+    overflow: hidden;
+}
+
+/* Left panel */
+#cg-left {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    border-right: 1px solid #ddd;
+    min-width: 0;
+}
+
+.cg-nav {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 0;
+    border-bottom: 1px solid #ddd;
+    flex-shrink: 0;
+    padding: 0 16px;
+}
+
+.cg-nav-tab {
+    padding: 9px 14px;
+    cursor: pointer;
+    font-size: 0.78rem;
+    font-weight: 500;
+    color: #777;
+    border-bottom: 2px solid transparent;
+    margin-bottom: -1px;
+    user-select: none;
+    transition: color 0.15s, border-color 0.15s;
+    white-space: nowrap;
+}
+
+.cg-nav-tab:hover {
+    color: #444;
+}
+
+.cg-nav-tab.active {
+    color: var(--md-primary-fg-color);
+    border-bottom-color: var(--md-primary-fg-color);
+}
+
+.cg-panels {
+    flex: 1;
+    overflow-y: auto;
+    padding: 16px 20px;
+}
+
+.cg-panel {
+    display: none;
+}
+
+.cg-panel.active {
+    display: block;
+}
+
+.cg-panel-desc {
+    font-size: 0.75rem;
+    color: #888;
+    margin-bottom: 12px;
+    line-height: 1.5;
+}
+
+.cg-panel-desc a {
+    color: var(--md-primary-fg-color);
+}
+
+.cg-help {
+    color: var(--md-primary-fg-color);
+    text-decoration: none;
+    margin-left: 4px;
+    vertical-align: middle;
+    flex-shrink: 0;
+    transition: color 0.15s;
+}
+
+.cg-help:hover {
+    color: var(--md-primary-fg-color--dark, #2a6e5f);
+}
+
+/* Right panel */
+#cg-right {
+    flex: 1;
+    display: flex;
+    flex-direction: column;
+    min-width: 0;
+}
+
+.cg-output-tabs {
+    display: flex;
+    border-bottom: 1px solid #ddd;
+    flex-shrink: 0;
+    padding: 0 16px;
+}
+
+.cg-output-tab {
+    padding: 9px 14px;
+    cursor: pointer;
+    font-size: 0.78rem;
+    font-weight: 500;
+    border-bottom: 2px solid transparent;
+    margin-bottom: -1px;
+    color: #777;
+    transition: color 0.15s, border-color 0.15s;
+    user-select: none;
+    white-space: nowrap;
+}
+
+.cg-output-tab:hover {
+    color: #444;
+}
+
+.cg-output-tab.active {
+    color: var(--md-primary-fg-color);
+    border-bottom-color: var(--md-primary-fg-color);
+}
+
+.cg-btn-copy {
+    margin-left: auto;
+    background: none;
+    color: #777;
+    border: none;
+    border-bottom: 2px solid transparent;
+    margin-bottom: -1px;
+    padding: 9px 10px;
+    cursor: pointer;
+    line-height: 1;
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    transition: color 0.15s;
+}
+
+.cg-btn-copy:hover {
+    color: #333;
+}
+
+.cg-output-wrap {
+    flex: 1;
+    overflow: auto;
+    padding: 16px 20px;
+    display: flex;
+    flex-direction: column;
+}
+
+.cg-output-wrap pre {
+    margin: 0;
+    padding: 8px 10px;
+    background: #f5f5f5;
+    color: #333;
+    border: 1px solid #ddd;
+    border-radius: 6px;
+    overflow-x: auto;
+    font-size: 0.76rem;
+    line-height: 1.5;
+    flex: 1;
+    white-space: pre;
+}
+
+.cg-empty-msg {
+    color: #888;
+    font-style: italic;
+}
+
+.cg-warning {
+    padding: 6px 10px;
+    margin-top: 8px;
+    background: #fff3cd;
+    color: #856404;
+    border: 1px solid #ffc107;
+    border-radius: 4px;
+    font-size: 0.76rem;
+}
+
+/* Form fields */
+.cg-field {
+    margin-bottom: 0;
+    padding: 8px 12px;
+}
+
+.cg-field:nth-child(odd) {
+    background: #f8f8f8;
+}
+
+.cg-field:nth-child(even) {
+    background: #fff;
+}
+
+.cg-field > label {
+    display: block;
+    font-weight: 500;
+    margin-bottom: 4px;
+    font-size: 0.78rem;
+    color: #555;
+}
+
+.cg-field input[type="text"],
+.cg-field input[type="password"],
+.cg-field select {
+    width: 100%;
+    padding: 6px 8px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    font-size: 0.78rem;
+    font-family: inherit;
+    box-sizing: border-box;
+    background: #fff;
+}
+
+.cg-field input[type="text"]:focus,
+.cg-field input[type="password"]:focus,
+.cg-field select:focus {
+    border-color: var(--md-primary-fg-color);
+    outline: none;
+    box-shadow: 0 0 0 2px rgba(51, 133, 116, 0.15);
+}
+
+.cg-checkbox {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    margin-bottom: 10px;
+}
+
+.cg-checkbox input[type="checkbox"] {
+    accent-color: var(--md-primary-fg-color);
+}
+
+.cg-checkbox label {
+    font-weight: 500;
+    font-size: 0.78rem;
+    margin: 0;
+    cursor: pointer;
+}
+
+.cg-radio-group {
+    display: flex;
+    flex-direction: column;
+    gap: 4px;
+}
+
+.cg-radio-group label {
+    display: flex;
+    align-items: center;
+    gap: 4px;
+    font-weight: 400;
+    font-size: 0.78rem;
+    cursor: pointer;
+}
+
+.cg-radio-group input[type="radio"] {
+    accent-color: var(--md-primary-fg-color);
+}
+
+/* Inline field: label + control side by side */
+.cg-inline-field {
+    display: flex;
+    align-items: center;
+    gap: 12px;
+}
+
+.cg-inline-field > label {
+    margin-bottom: 0;
+    width: 60%;
+    flex-shrink: 0;
+}
+
+.cg-panel:not(#cg-panel-general) .cg-inline-field > label {
+    width: 50%;
+}
+
+.cg-inline-field > input[type="text"],
+.cg-inline-field > select {
+    padding: 4px 10px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    font-size: 0.75rem;
+    font-family: inherit;
+    box-sizing: border-box;
+    line-height: 1.4;
+    background: #fff;
+}
+
+.cg-inline-field > input[type="text"]:focus,
+.cg-inline-field > select:focus {
+    border-color: var(--md-primary-fg-color);
+    outline: none;
+    box-shadow: 0 0 0 2px rgba(51, 133, 116, 0.15);
+}
+
+#cg-email-in-section {
+    margin-top: 20px;
+}
+
+.cg-pg-label {
+    font-size: 0.75rem;
+    color: #888;
+    font-style: italic;
+}
+
+/* Button group toggle */
+.cg-btn-group {
+    display: flex;
+    flex-shrink: 0;
+}
+
+.cg-btn-group label {
+    cursor: pointer;
+    margin: 0;
+}
+
+.cg-btn-group input[type="radio"] {
+    display: none;
+}
+
+.cg-btn-group span {
+    display: block;
+    padding: 4px 14px;
+    font-size: 0.75rem;
+    font-weight: 500;
+    line-height: 1.4;
+    border: 1px solid #ccc;
+    color: #555;
+    background: #fff;
+    transition: background 0.15s, color 0.15s, border-color 0.15s;
+    user-select: none;
+}
+
+.cg-btn-group label:first-child span {
+    border-radius: 4px 0 0 4px;
+}
+
+.cg-btn-group label:last-child span {
+    border-radius: 0 4px 4px 0;
+}
+
+.cg-btn-group label + label span {
+    margin-left: -1px;
+}
+
+.cg-btn-group input[type="radio"]:checked + span {
+    background: var(--md-primary-fg-color);
+    color: #fff;
+    border-color: var(--md-primary-fg-color);
+    position: relative;
+    z-index: 1;
+}
+
+.cg-feature-grid {
+    display: flex;
+    flex-direction: column;
+    gap: 5px;
+}
+
+.cg-feature-row {
+    display: flex;
+    align-items: center;
+    gap: 8px;
+}
+
+.cg-feature-grid label {
+    display: flex;
+    align-items: center;
+    gap: 6px;
+    font-size: 0.78rem;
+    cursor: pointer;
+}
+
+.cg-feature-grid input[type="checkbox"] {
+    accent-color: var(--md-primary-fg-color);
+}
+
+.cg-btn-configure {
+    background: none;
+    border: 1px solid var(--md-primary-fg-color);
+    border-radius: 10px;
+    color: var(--md-primary-fg-color);
+    font-size: 0.68rem;
+    font-family: inherit;
+    padding: 1px 10px;
+    cursor: pointer;
+    white-space: nowrap;
+    transition: background 0.15s, color 0.15s;
+}
+
+.cg-btn-configure:hover {
+    background: var(--md-primary-fg-color);
+    color: #fff;
+}
+
+/* Repeatable rows */
+.cg-repeatable-row {
+    display: flex;
+    gap: 6px;
+    align-items: center;
+    margin-bottom: 6px;
+    flex-wrap: wrap;
+}
+
+.cg-repeatable-row input,
+.cg-repeatable-row select {
+    flex: 1;
+    min-width: 80px;
+    padding: 5px 6px;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    font-size: 0.75rem;
+    font-family: inherit;
+    box-sizing: border-box;
+}
+
+.cg-repeatable-row input:focus,
+.cg-repeatable-row select:focus {
+    border-color: var(--md-primary-fg-color);
+    outline: none;
+}
+
+.cg-repeatable-row input:disabled,
+.cg-repeatable-row select:disabled {
+    background: #eee;
+    color: #999;
+    cursor: not-allowed;
+}
+
+.cg-btn-remove {
+    background: none;
+    border: 1px solid #ccc;
+    border-radius: 4px;
+    cursor: pointer;
+    font-size: 0.9rem;
+    padding: 5px 8px;
+    color: #999;
+    line-height: 1;
+}
+
+.cg-btn-remove:hover {
+    background: #fee;
+    border-color: #c66;
+    color: #c33;
+}
+
+.cg-btn-add {
+    background: none;
+    border: 1px dashed #bbb;
+    border-radius: 4px;
+    cursor: pointer;
+    padding: 5px 10px;
+    font-size: 0.75rem;
+    color: #777;
+    margin-top: 2px;
+}
+
+.cg-btn-add:hover {
+    border-color: var(--md-primary-fg-color);
+    color: var(--md-primary-fg-color);
+}
+
+/* Dark mode */
+body[data-md-color-scheme="slate"] .cg-modal-dialog {
+    background: #1e1e2e;
+}
+
+body[data-md-color-scheme="slate"] .cg-modal-header {
+    border-bottom-color: #444;
+}
+
+body[data-md-color-scheme="slate"] .cg-modal-title {
+    color: #ddd;
+}
+
+body[data-md-color-scheme="slate"] .cg-modal-desc {
+    color: #777;
+}
+
+body[data-md-color-scheme="slate"] .cg-modal-reset {
+    border-color: #555;
+    color: #888;
+}
+
+body[data-md-color-scheme="slate"] .cg-modal-reset:hover {
+    border-color: #888;
+    color: #ddd;
+}
+
+body[data-md-color-scheme="slate"] .cg-modal-close {
+    color: #777;
+}
+
+body[data-md-color-scheme="slate"] .cg-modal-close:hover {
+    color: #ddd;
+}
+
+body[data-md-color-scheme="slate"] #cg-left {
+    border-right-color: #444;
+}
+
+body[data-md-color-scheme="slate"] .cg-nav {
+    border-bottom-color: #444;
+}
+
+body[data-md-color-scheme="slate"] .cg-nav-tab {
+    color: #888;
+}
+
+body[data-md-color-scheme="slate"] .cg-nav-tab:hover {
+    color: #bbb;
+}
+
+body[data-md-color-scheme="slate"] .cg-output-tabs {
+    border-bottom-color: #444;
+}
+
+body[data-md-color-scheme="slate"] .cg-output-tab {
+    color: #888;
+}
+
+body[data-md-color-scheme="slate"] .cg-output-tab:hover {
+    color: #bbb;
+}
+
+body[data-md-color-scheme="slate"] .cg-btn-copy {
+    color: #777;
+}
+
+body[data-md-color-scheme="slate"] .cg-btn-copy:hover {
+    color: #bbb;
+}
+
+body[data-md-color-scheme="slate"] .cg-output-wrap pre {
+    background: #161620;
+    color: #ddd;
+    border-color: #444;
+}
+
+body[data-md-color-scheme="slate"] .cg-field:nth-child(odd) {
+    background: #232334;
+}
+
+body[data-md-color-scheme="slate"] .cg-field:nth-child(even) {
+    background: #1e1e2e;
+}
+
+body[data-md-color-scheme="slate"] .cg-panel-desc {
+    color: #777;
+}
+
+body[data-md-color-scheme="slate"] .cg-field > label {
+    color: #aaa;
+}
+
+body[data-md-color-scheme="slate"] .cg-field input[type="text"],
+body[data-md-color-scheme="slate"] .cg-field input[type="password"],
+body[data-md-color-scheme="slate"] .cg-field select {
+    background: #2a2a3a;
+    border-color: #555;
+    color: #ddd;
+}
+
+body[data-md-color-scheme="slate"] .cg-btn-group span {
+    background: #2a2a3a;
+    border-color: #555;
+    color: #aaa;
+}
+
+body[data-md-color-scheme="slate"] .cg-btn-group input[type="radio"]:checked + span {
+    background: var(--md-primary-fg-color);
+    color: #fff;
+    border-color: var(--md-primary-fg-color);
+}
+
+body[data-md-color-scheme="slate"] .cg-checkbox label {
+    color: #ccc;
+}
+
+body[data-md-color-scheme="slate"] .cg-radio-group label {
+    color: #ccc;
+}
+
+body[data-md-color-scheme="slate"] .cg-feature-grid label {
+    color: #ccc;
+}
+
+body[data-md-color-scheme="slate"] .cg-repeatable-row input,
+body[data-md-color-scheme="slate"] .cg-repeatable-row select {
+    background: #2a2a3a;
+    border-color: #555;
+    color: #ddd;
+}
+
+body[data-md-color-scheme="slate"] .cg-repeatable-row input:disabled,
+body[data-md-color-scheme="slate"] .cg-repeatable-row select:disabled {
+    background: #1a1a28;
+    color: #666;
+}
+
+body[data-md-color-scheme="slate"] .cg-btn-remove {
+    border-color: #555;
+    color: #888;
+}
+
+body[data-md-color-scheme="slate"] .cg-btn-add {
+    border-color: #555;
+    color: #888;
+}
+
+body[data-md-color-scheme="slate"] .cg-warning {
+    background: #3a2e00;
+    color: #ffc107;
+    border-color: #665200;
+}
+
+/* Mobile toggle bar (hidden on desktop) */
+.cg-mobile-toggle {
+    display: none;
+}
+
+/* Responsive */
+@media (max-width: 900px) {
+    .cg-modal-dialog {
+        inset: 0;
+        border-radius: 0;
+    }
+
+    .cg-modal-header {
+        padding: 8px 16px;
+    }
+
+    .cg-modal-title {
+        font-size: 0.85rem;
+    }
+
+    .cg-modal-desc {
+        display: none;
+    }
+
+    .cg-modal-body {
+        flex-direction: column;
+    }
+
+    .cg-mobile-toggle {
+        display: flex;
+        flex-shrink: 0;
+        border-bottom: 1px solid #ddd;
+    }
+
+    .cg-mobile-toggle-btn {
+        flex: 1;
+        padding: 8px 0;
+        border: none;
+        background: #f5f5f5;
+        font-size: 0.78rem;
+        font-weight: 500;
+        font-family: inherit;
+        color: #777;
+        cursor: pointer;
+        transition: background 0.15s, color 0.15s;
+    }
+
+    .cg-mobile-toggle-btn.active {
+        background: #fff;
+        color: var(--md-primary-fg-color);
+        box-shadow: inset 0 -2px 0 var(--md-primary-fg-color);
+    }
+
+    #cg-left {
+        border-right: none;
+        flex: 1;
+        min-height: 0;
+    }
+
+    #cg-right {
+        flex: 1;
+        display: none;
+        min-height: 0;
+    }
+
+    #cg-right.cg-mobile-active {
+        display: flex;
+    }
+
+    #cg-left.cg-mobile-hidden {
+        display: none;
+    }
+
+    .cg-nav {
+        overflow-x: auto;
+        flex-wrap: nowrap;
+        -webkit-overflow-scrolling: touch;
+    }
+
+    .cg-inline-field {
+        flex-direction: column;
+        align-items: stretch;
+        gap: 4px;
+    }
+
+    .cg-inline-field > label {
+        width: 100%;
+    }
+
+    .cg-panel:not(#cg-panel-general) .cg-inline-field > label {
+        width: 100%;
+    }
+}
+
+/* Dark mode mobile toggle */
+body[data-md-color-scheme="slate"] .cg-mobile-toggle {
+    border-bottom-color: #444;
+}
+
+body[data-md-color-scheme="slate"] .cg-mobile-toggle-btn {
+    background: #2a2a3a;
+    color: #888;
+}
+
+body[data-md-color-scheme="slate"] .cg-mobile-toggle-btn.active {
+    background: #1e1e2e;
+    color: var(--md-primary-fg-color);
+}
diff --git a/docs/static/img/config-generator.png b/docs/static/img/config-generator.png
new file mode 100644
index 00000000..1fce59d1
Binary files /dev/null and b/docs/static/img/config-generator.png differ
diff --git a/docs/static/js/bcrypt.js b/docs/static/js/bcrypt.js
new file mode 100644
index 00000000..517ea20d
--- /dev/null
+++ b/docs/static/js/bcrypt.js
@@ -0,0 +1,1220 @@
+// GENERATED FILE. DO NOT EDIT.
+(function (global, factory) {
+  function preferDefault(exports) {
+    return exports.default || exports;
+  }
+  if (typeof define === "function" && define.amd) {
+    define(["crypto"], function (_crypto) {
+      var exports = {};
+      factory(exports, _crypto);
+      return preferDefault(exports);
+    });
+  } else if (typeof exports === "object") {
+    factory(exports, require("crypto"));
+    if (typeof module === "object") module.exports = preferDefault(exports);
+  } else {
+    (function () {
+      var exports = {};
+      factory(exports, global.crypto);
+      global.bcrypt = preferDefault(exports);
+    })();
+  }
+})(
+  typeof globalThis !== "undefined"
+    ? globalThis
+    : typeof self !== "undefined"
+      ? self
+      : this,
+  function (_exports, _crypto) {
+    "use strict";
+
+    Object.defineProperty(_exports, "__esModule", {
+      value: true,
+    });
+    _exports.compare = compare;
+    _exports.compareSync = compareSync;
+    _exports.decodeBase64 = decodeBase64;
+    _exports.default = void 0;
+    _exports.encodeBase64 = encodeBase64;
+    _exports.genSalt = genSalt;
+    _exports.genSaltSync = genSaltSync;
+    _exports.getRounds = getRounds;
+    _exports.getSalt = getSalt;
+    _exports.hash = hash;
+    _exports.hashSync = hashSync;
+    _exports.setRandomFallback = setRandomFallback;
+    _exports.truncates = truncates;
+    _crypto = _interopRequireDefault(_crypto);
+    function _interopRequireDefault(e) {
+      return e && e.__esModule ? e : { default: e };
+    }
+    /*
+   Copyright (c) 2012 Nevins Bartolomeo <nevins.bartolomeo@gmail.com>
+   Copyright (c) 2012 Shane Girish <shaneGirish@gmail.com>
+   Copyright (c) 2025 Daniel Wirtz <dcode@dcode.io>
+  
+   Redistribution and use in source and binary forms, with or without
+   modification, are permitted provided that the following conditions
+   are met:
+   1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+   2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+   3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+  
+   THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+   IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+   OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+   IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+   INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+   NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+   THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+   */
+
+    // The Node.js crypto module is used as a fallback for the Web Crypto API. When
+    // building for the browser, inclusion of the crypto module should be disabled,
+    // which the package hints at in its package.json for bundlers that support it.
+
+    /**
+     * The random implementation to use as a fallback.
+     * @type {?function(number):!Array.<number>}
+     * @inner
+     */
+    var randomFallback = null;
+
+    /**
+     * Generates cryptographically secure random bytes.
+     * @function
+     * @param {number} len Bytes length
+     * @returns {!Array.<number>} Random bytes
+     * @throws {Error} If no random implementation is available
+     * @inner
+     */
+    function randomBytes(len) {
+      // Web Crypto API. Globally available in the browser and in Node.js >=23.
+      try {
+        return crypto.getRandomValues(new Uint8Array(len));
+      } catch {}
+      // Node.js crypto module for non-browser environments.
+      try {
+        return _crypto.default.randomBytes(len);
+      } catch {}
+      // Custom fallback specified with `setRandomFallback`.
+      if (!randomFallback) {
+        throw Error(
+          "Neither WebCryptoAPI nor a crypto module is available. Use bcrypt.setRandomFallback to set an alternative",
+        );
+      }
+      return randomFallback(len);
+    }
+
+    /**
+     * Sets the pseudo random number generator to use as a fallback if neither node's `crypto` module nor the Web Crypto
+     *  API is available. Please note: It is highly important that the PRNG used is cryptographically secure and that it
+     *  is seeded properly!
+     * @param {?function(number):!Array.<number>} random Function taking the number of bytes to generate as its
+     *  sole argument, returning the corresponding array of cryptographically secure random byte values.
+     * @see http://nodejs.org/api/crypto.html
+     * @see http://www.w3.org/TR/WebCryptoAPI/
+     */
+    function setRandomFallback(random) {
+      randomFallback = random;
+    }
+
+    /**
+     * Synchronously generates a salt.
+     * @param {number=} rounds Number of rounds to use, defaults to 10 if omitted
+     * @param {number=} seed_length Not supported.
+     * @returns {string} Resulting salt
+     * @throws {Error} If a random fallback is required but not set
+     */
+    function genSaltSync(rounds, seed_length) {
+      rounds = rounds || GENSALT_DEFAULT_LOG2_ROUNDS;
+      if (typeof rounds !== "number")
+        throw Error(
+          "Illegal arguments: " + typeof rounds + ", " + typeof seed_length,
+        );
+      if (rounds < 4) rounds = 4;
+      else if (rounds > 31) rounds = 31;
+      var salt = [];
+      salt.push("$2b$");
+      if (rounds < 10) salt.push("0");
+      salt.push(rounds.toString());
+      salt.push("$");
+      salt.push(base64_encode(randomBytes(BCRYPT_SALT_LEN), BCRYPT_SALT_LEN)); // May throw
+      return salt.join("");
+    }
+
+    /**
+     * Asynchronously generates a salt.
+     * @param {(number|function(Error, string=))=} rounds Number of rounds to use, defaults to 10 if omitted
+     * @param {(number|function(Error, string=))=} seed_length Not supported.
+     * @param {function(Error, string=)=} callback Callback receiving the error, if any, and the resulting salt
+     * @returns {!Promise} If `callback` has been omitted
+     * @throws {Error} If `callback` is present but not a function
+     */
+    function genSalt(rounds, seed_length, callback) {
+      if (typeof seed_length === "function")
+        (callback = seed_length), (seed_length = undefined); // Not supported.
+      if (typeof rounds === "function")
+        (callback = rounds), (rounds = undefined);
+      if (typeof rounds === "undefined") rounds = GENSALT_DEFAULT_LOG2_ROUNDS;
+      else if (typeof rounds !== "number")
+        throw Error("illegal arguments: " + typeof rounds);
+      function _async(callback) {
+        nextTick(function () {
+          // Pretty thin, but salting is fast enough
+          try {
+            callback(null, genSaltSync(rounds));
+          } catch (err) {
+            callback(err);
+          }
+        });
+      }
+      if (callback) {
+        if (typeof callback !== "function")
+          throw Error("Illegal callback: " + typeof callback);
+        _async(callback);
+      } else
+        return new Promise(function (resolve, reject) {
+          _async(function (err, res) {
+            if (err) {
+              reject(err);
+              return;
+            }
+            resolve(res);
+          });
+        });
+    }
+
+    /**
+     * Synchronously generates a hash for the given password.
+     * @param {string} password Password to hash
+     * @param {(number|string)=} salt Salt length to generate or salt to use, default to 10
+     * @returns {string} Resulting hash
+     */
+    function hashSync(password, salt) {
+      if (typeof salt === "undefined") salt = GENSALT_DEFAULT_LOG2_ROUNDS;
+      if (typeof salt === "number") salt = genSaltSync(salt);
+      if (typeof password !== "string" || typeof salt !== "string")
+        throw Error(
+          "Illegal arguments: " + typeof password + ", " + typeof salt,
+        );
+      return _hash(password, salt);
+    }
+
+    /**
+     * Asynchronously generates a hash for the given password.
+     * @param {string} password Password to hash
+     * @param {number|string} salt Salt length to generate or salt to use
+     * @param {function(Error, string=)=} callback Callback receiving the error, if any, and the resulting hash
+     * @param {function(number)=} progressCallback Callback successively called with the percentage of rounds completed
+     *  (0.0 - 1.0), maximally once per `MAX_EXECUTION_TIME = 100` ms.
+     * @returns {!Promise} If `callback` has been omitted
+     * @throws {Error} If `callback` is present but not a function
+     */
+    function hash(password, salt, callback, progressCallback) {
+      function _async(callback) {
+        if (typeof password === "string" && typeof salt === "number")
+          genSalt(salt, function (err, salt) {
+            _hash(password, salt, callback, progressCallback);
+          });
+        else if (typeof password === "string" && typeof salt === "string")
+          _hash(password, salt, callback, progressCallback);
+        else
+          nextTick(
+            callback.bind(
+              this,
+              Error(
+                "Illegal arguments: " + typeof password + ", " + typeof salt,
+              ),
+            ),
+          );
+      }
+      if (callback) {
+        if (typeof callback !== "function")
+          throw Error("Illegal callback: " + typeof callback);
+        _async(callback);
+      } else
+        return new Promise(function (resolve, reject) {
+          _async(function (err, res) {
+            if (err) {
+              reject(err);
+              return;
+            }
+            resolve(res);
+          });
+        });
+    }
+
+    /**
+     * Compares two strings of the same length in constant time.
+     * @param {string} known Must be of the correct length
+     * @param {string} unknown Must be the same length as `known`
+     * @returns {boolean}
+     * @inner
+     */
+    function safeStringCompare(known, unknown) {
+      var diff = known.length ^ unknown.length;
+      for (var i = 0; i < known.length; ++i) {
+        diff |= known.charCodeAt(i) ^ unknown.charCodeAt(i);
+      }
+      return diff === 0;
+    }
+
+    /**
+     * Synchronously tests a password against a hash.
+     * @param {string} password Password to compare
+     * @param {string} hash Hash to test against
+     * @returns {boolean} true if matching, otherwise false
+     * @throws {Error} If an argument is illegal
+     */
+    function compareSync(password, hash) {
+      if (typeof password !== "string" || typeof hash !== "string")
+        throw Error(
+          "Illegal arguments: " + typeof password + ", " + typeof hash,
+        );
+      if (hash.length !== 60) return false;
+      return safeStringCompare(
+        hashSync(password, hash.substring(0, hash.length - 31)),
+        hash,
+      );
+    }
+
+    /**
+     * Asynchronously tests a password against a hash.
+     * @param {string} password Password to compare
+     * @param {string} hashValue Hash to test against
+     * @param {function(Error, boolean)=} callback Callback receiving the error, if any, otherwise the result
+     * @param {function(number)=} progressCallback Callback successively called with the percentage of rounds completed
+     *  (0.0 - 1.0), maximally once per `MAX_EXECUTION_TIME = 100` ms.
+     * @returns {!Promise} If `callback` has been omitted
+     * @throws {Error} If `callback` is present but not a function
+     */
+    function compare(password, hashValue, callback, progressCallback) {
+      function _async(callback) {
+        if (typeof password !== "string" || typeof hashValue !== "string") {
+          nextTick(
+            callback.bind(
+              this,
+              Error(
+                "Illegal arguments: " +
+                  typeof password +
+                  ", " +
+                  typeof hashValue,
+              ),
+            ),
+          );
+          return;
+        }
+        if (hashValue.length !== 60) {
+          nextTick(callback.bind(this, null, false));
+          return;
+        }
+        hash(
+          password,
+          hashValue.substring(0, 29),
+          function (err, comp) {
+            if (err) callback(err);
+            else callback(null, safeStringCompare(comp, hashValue));
+          },
+          progressCallback,
+        );
+      }
+      if (callback) {
+        if (typeof callback !== "function")
+          throw Error("Illegal callback: " + typeof callback);
+        _async(callback);
+      } else
+        return new Promise(function (resolve, reject) {
+          _async(function (err, res) {
+            if (err) {
+              reject(err);
+              return;
+            }
+            resolve(res);
+          });
+        });
+    }
+
+    /**
+     * Gets the number of rounds used to encrypt the specified hash.
+     * @param {string} hash Hash to extract the used number of rounds from
+     * @returns {number} Number of rounds used
+     * @throws {Error} If `hash` is not a string
+     */
+    function getRounds(hash) {
+      if (typeof hash !== "string")
+        throw Error("Illegal arguments: " + typeof hash);
+      return parseInt(hash.split("$")[2], 10);
+    }
+
+    /**
+     * Gets the salt portion from a hash. Does not validate the hash.
+     * @param {string} hash Hash to extract the salt from
+     * @returns {string} Extracted salt part
+     * @throws {Error} If `hash` is not a string or otherwise invalid
+     */
+    function getSalt(hash) {
+      if (typeof hash !== "string")
+        throw Error("Illegal arguments: " + typeof hash);
+      if (hash.length !== 60)
+        throw Error("Illegal hash length: " + hash.length + " != 60");
+      return hash.substring(0, 29);
+    }
+
+    /**
+     * Tests if a password will be truncated when hashed, that is its length is
+     * greater than 72 bytes when converted to UTF-8.
+     * @param {string} password The password to test
+     * @returns {boolean} `true` if truncated, otherwise `false`
+     */
+    function truncates(password) {
+      if (typeof password !== "string")
+        throw Error("Illegal arguments: " + typeof password);
+      return utf8Length(password) > 72;
+    }
+
+    /**
+     * Continues with the callback after yielding to the event loop.
+     * @function
+     * @param {function(...[*])} callback Callback to execute
+     * @inner
+     */
+    var nextTick =
+      typeof setImmediate === "function"
+        ? setImmediate
+        : typeof scheduler === "object" &&
+            typeof scheduler.postTask === "function"
+          ? scheduler.postTask.bind(scheduler)
+          : setTimeout;
+
+    /** Calculates the byte length of a string encoded as UTF8. */
+    function utf8Length(string) {
+      var len = 0,
+        c = 0;
+      for (var i = 0; i < string.length; ++i) {
+        c = string.charCodeAt(i);
+        if (c < 128) len += 1;
+        else if (c < 2048) len += 2;
+        else if (
+          (c & 0xfc00) === 0xd800 &&
+          (string.charCodeAt(i + 1) & 0xfc00) === 0xdc00
+        ) {
+          ++i;
+          len += 4;
+        } else len += 3;
+      }
+      return len;
+    }
+
+    /** Converts a string to an array of UTF8 bytes. */
+    function utf8Array(string) {
+      var offset = 0,
+        c1,
+        c2;
+      var buffer = new Array(utf8Length(string));
+      for (var i = 0, k = string.length; i < k; ++i) {
+        c1 = string.charCodeAt(i);
+        if (c1 < 128) {
+          buffer[offset++] = c1;
+        } else if (c1 < 2048) {
+          buffer[offset++] = (c1 >> 6) | 192;
+          buffer[offset++] = (c1 & 63) | 128;
+        } else if (
+          (c1 & 0xfc00) === 0xd800 &&
+          ((c2 = string.charCodeAt(i + 1)) & 0xfc00) === 0xdc00
+        ) {
+          c1 = 0x10000 + ((c1 & 0x03ff) << 10) + (c2 & 0x03ff);
+          ++i;
+          buffer[offset++] = (c1 >> 18) | 240;
+          buffer[offset++] = ((c1 >> 12) & 63) | 128;
+          buffer[offset++] = ((c1 >> 6) & 63) | 128;
+          buffer[offset++] = (c1 & 63) | 128;
+        } else {
+          buffer[offset++] = (c1 >> 12) | 224;
+          buffer[offset++] = ((c1 >> 6) & 63) | 128;
+          buffer[offset++] = (c1 & 63) | 128;
+        }
+      }
+      return buffer;
+    }
+
+    // A base64 implementation for the bcrypt algorithm. This is partly non-standard.
+
+    /**
+     * bcrypt's own non-standard base64 dictionary.
+     * @type {!Array.<string>}
+     * @const
+     * @inner
+     **/
+    var BASE64_CODE =
+      "./ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789".split(
+        "",
+      );
+
+    /**
+     * @type {!Array.<number>}
+     * @const
+     * @inner
+     **/
+    var BASE64_INDEX = [
+      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+      -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 0, 1, 54, 55, 56, 57, 58, 59, 60,
+      61, 62, 63, -1, -1, -1, -1, -1, -1, -1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
+      12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, -1, -1,
+      -1, -1, -1, -1, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41,
+      42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, -1, -1, -1, -1, -1,
+    ];
+
+    /**
+     * Encodes a byte array to base64 with up to len bytes of input.
+     * @param {!Array.<number>} b Byte array
+     * @param {number} len Maximum input length
+     * @returns {string}
+     * @inner
+     */
+    function base64_encode(b, len) {
+      var off = 0,
+        rs = [],
+        c1,
+        c2;
+      if (len <= 0 || len > b.length) throw Error("Illegal len: " + len);
+      while (off < len) {
+        c1 = b[off++] & 0xff;
+        rs.push(BASE64_CODE[(c1 >> 2) & 0x3f]);
+        c1 = (c1 & 0x03) << 4;
+        if (off >= len) {
+          rs.push(BASE64_CODE[c1 & 0x3f]);
+          break;
+        }
+        c2 = b[off++] & 0xff;
+        c1 |= (c2 >> 4) & 0x0f;
+        rs.push(BASE64_CODE[c1 & 0x3f]);
+        c1 = (c2 & 0x0f) << 2;
+        if (off >= len) {
+          rs.push(BASE64_CODE[c1 & 0x3f]);
+          break;
+        }
+        c2 = b[off++] & 0xff;
+        c1 |= (c2 >> 6) & 0x03;
+        rs.push(BASE64_CODE[c1 & 0x3f]);
+        rs.push(BASE64_CODE[c2 & 0x3f]);
+      }
+      return rs.join("");
+    }
+
+    /**
+     * Decodes a base64 encoded string to up to len bytes of output.
+     * @param {string} s String to decode
+     * @param {number} len Maximum output length
+     * @returns {!Array.<number>}
+     * @inner
+     */
+    function base64_decode(s, len) {
+      var off = 0,
+        slen = s.length,
+        olen = 0,
+        rs = [],
+        c1,
+        c2,
+        c3,
+        c4,
+        o,
+        code;
+      if (len <= 0) throw Error("Illegal len: " + len);
+      while (off < slen - 1 && olen < len) {
+        code = s.charCodeAt(off++);
+        c1 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        code = s.charCodeAt(off++);
+        c2 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        if (c1 == -1 || c2 == -1) break;
+        o = (c1 << 2) >>> 0;
+        o |= (c2 & 0x30) >> 4;
+        rs.push(String.fromCharCode(o));
+        if (++olen >= len || off >= slen) break;
+        code = s.charCodeAt(off++);
+        c3 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        if (c3 == -1) break;
+        o = ((c2 & 0x0f) << 4) >>> 0;
+        o |= (c3 & 0x3c) >> 2;
+        rs.push(String.fromCharCode(o));
+        if (++olen >= len || off >= slen) break;
+        code = s.charCodeAt(off++);
+        c4 = code < BASE64_INDEX.length ? BASE64_INDEX[code] : -1;
+        o = ((c3 & 0x03) << 6) >>> 0;
+        o |= c4;
+        rs.push(String.fromCharCode(o));
+        ++olen;
+      }
+      var res = [];
+      for (off = 0; off < olen; off++) res.push(rs[off].charCodeAt(0));
+      return res;
+    }
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var BCRYPT_SALT_LEN = 16;
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var GENSALT_DEFAULT_LOG2_ROUNDS = 10;
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var BLOWFISH_NUM_ROUNDS = 16;
+
+    /**
+     * @type {number}
+     * @const
+     * @inner
+     */
+    var MAX_EXECUTION_TIME = 100;
+
+    /**
+     * @type {Array.<number>}
+     * @const
+     * @inner
+     */
+    var P_ORIG = [
+      0x243f6a88, 0x85a308d3, 0x13198a2e, 0x03707344, 0xa4093822, 0x299f31d0,
+      0x082efa98, 0xec4e6c89, 0x452821e6, 0x38d01377, 0xbe5466cf, 0x34e90c6c,
+      0xc0ac29b7, 0xc97c50dd, 0x3f84d5b5, 0xb5470917, 0x9216d5d9, 0x8979fb1b,
+    ];
+
+    /**
+     * @type {Array.<number>}
+     * @const
+     * @inner
+     */
+    var S_ORIG = [
+      0xd1310ba6, 0x98dfb5ac, 0x2ffd72db, 0xd01adfb7, 0xb8e1afed, 0x6a267e96,
+      0xba7c9045, 0xf12c7f99, 0x24a19947, 0xb3916cf7, 0x0801f2e2, 0x858efc16,
+      0x636920d8, 0x71574e69, 0xa458fea3, 0xf4933d7e, 0x0d95748f, 0x728eb658,
+      0x718bcd58, 0x82154aee, 0x7b54a41d, 0xc25a59b5, 0x9c30d539, 0x2af26013,
+      0xc5d1b023, 0x286085f0, 0xca417918, 0xb8db38ef, 0x8e79dcb0, 0x603a180e,
+      0x6c9e0e8b, 0xb01e8a3e, 0xd71577c1, 0xbd314b27, 0x78af2fda, 0x55605c60,
+      0xe65525f3, 0xaa55ab94, 0x57489862, 0x63e81440, 0x55ca396a, 0x2aab10b6,
+      0xb4cc5c34, 0x1141e8ce, 0xa15486af, 0x7c72e993, 0xb3ee1411, 0x636fbc2a,
+      0x2ba9c55d, 0x741831f6, 0xce5c3e16, 0x9b87931e, 0xafd6ba33, 0x6c24cf5c,
+      0x7a325381, 0x28958677, 0x3b8f4898, 0x6b4bb9af, 0xc4bfe81b, 0x66282193,
+      0x61d809cc, 0xfb21a991, 0x487cac60, 0x5dec8032, 0xef845d5d, 0xe98575b1,
+      0xdc262302, 0xeb651b88, 0x23893e81, 0xd396acc5, 0x0f6d6ff3, 0x83f44239,
+      0x2e0b4482, 0xa4842004, 0x69c8f04a, 0x9e1f9b5e, 0x21c66842, 0xf6e96c9a,
+      0x670c9c61, 0xabd388f0, 0x6a51a0d2, 0xd8542f68, 0x960fa728, 0xab5133a3,
+      0x6eef0b6c, 0x137a3be4, 0xba3bf050, 0x7efb2a98, 0xa1f1651d, 0x39af0176,
+      0x66ca593e, 0x82430e88, 0x8cee8619, 0x456f9fb4, 0x7d84a5c3, 0x3b8b5ebe,
+      0xe06f75d8, 0x85c12073, 0x401a449f, 0x56c16aa6, 0x4ed3aa62, 0x363f7706,
+      0x1bfedf72, 0x429b023d, 0x37d0d724, 0xd00a1248, 0xdb0fead3, 0x49f1c09b,
+      0x075372c9, 0x80991b7b, 0x25d479d8, 0xf6e8def7, 0xe3fe501a, 0xb6794c3b,
+      0x976ce0bd, 0x04c006ba, 0xc1a94fb6, 0x409f60c4, 0x5e5c9ec2, 0x196a2463,
+      0x68fb6faf, 0x3e6c53b5, 0x1339b2eb, 0x3b52ec6f, 0x6dfc511f, 0x9b30952c,
+      0xcc814544, 0xaf5ebd09, 0xbee3d004, 0xde334afd, 0x660f2807, 0x192e4bb3,
+      0xc0cba857, 0x45c8740f, 0xd20b5f39, 0xb9d3fbdb, 0x5579c0bd, 0x1a60320a,
+      0xd6a100c6, 0x402c7279, 0x679f25fe, 0xfb1fa3cc, 0x8ea5e9f8, 0xdb3222f8,
+      0x3c7516df, 0xfd616b15, 0x2f501ec8, 0xad0552ab, 0x323db5fa, 0xfd238760,
+      0x53317b48, 0x3e00df82, 0x9e5c57bb, 0xca6f8ca0, 0x1a87562e, 0xdf1769db,
+      0xd542a8f6, 0x287effc3, 0xac6732c6, 0x8c4f5573, 0x695b27b0, 0xbbca58c8,
+      0xe1ffa35d, 0xb8f011a0, 0x10fa3d98, 0xfd2183b8, 0x4afcb56c, 0x2dd1d35b,
+      0x9a53e479, 0xb6f84565, 0xd28e49bc, 0x4bfb9790, 0xe1ddf2da, 0xa4cb7e33,
+      0x62fb1341, 0xcee4c6e8, 0xef20cada, 0x36774c01, 0xd07e9efe, 0x2bf11fb4,
+      0x95dbda4d, 0xae909198, 0xeaad8e71, 0x6b93d5a0, 0xd08ed1d0, 0xafc725e0,
+      0x8e3c5b2f, 0x8e7594b7, 0x8ff6e2fb, 0xf2122b64, 0x8888b812, 0x900df01c,
+      0x4fad5ea0, 0x688fc31c, 0xd1cff191, 0xb3a8c1ad, 0x2f2f2218, 0xbe0e1777,
+      0xea752dfe, 0x8b021fa1, 0xe5a0cc0f, 0xb56f74e8, 0x18acf3d6, 0xce89e299,
+      0xb4a84fe0, 0xfd13e0b7, 0x7cc43b81, 0xd2ada8d9, 0x165fa266, 0x80957705,
+      0x93cc7314, 0x211a1477, 0xe6ad2065, 0x77b5fa86, 0xc75442f5, 0xfb9d35cf,
+      0xebcdaf0c, 0x7b3e89a0, 0xd6411bd3, 0xae1e7e49, 0x00250e2d, 0x2071b35e,
+      0x226800bb, 0x57b8e0af, 0x2464369b, 0xf009b91e, 0x5563911d, 0x59dfa6aa,
+      0x78c14389, 0xd95a537f, 0x207d5ba2, 0x02e5b9c5, 0x83260376, 0x6295cfa9,
+      0x11c81968, 0x4e734a41, 0xb3472dca, 0x7b14a94a, 0x1b510052, 0x9a532915,
+      0xd60f573f, 0xbc9bc6e4, 0x2b60a476, 0x81e67400, 0x08ba6fb5, 0x571be91f,
+      0xf296ec6b, 0x2a0dd915, 0xb6636521, 0xe7b9f9b6, 0xff34052e, 0xc5855664,
+      0x53b02d5d, 0xa99f8fa1, 0x08ba4799, 0x6e85076a, 0x4b7a70e9, 0xb5b32944,
+      0xdb75092e, 0xc4192623, 0xad6ea6b0, 0x49a7df7d, 0x9cee60b8, 0x8fedb266,
+      0xecaa8c71, 0x699a17ff, 0x5664526c, 0xc2b19ee1, 0x193602a5, 0x75094c29,
+      0xa0591340, 0xe4183a3e, 0x3f54989a, 0x5b429d65, 0x6b8fe4d6, 0x99f73fd6,
+      0xa1d29c07, 0xefe830f5, 0x4d2d38e6, 0xf0255dc1, 0x4cdd2086, 0x8470eb26,
+      0x6382e9c6, 0x021ecc5e, 0x09686b3f, 0x3ebaefc9, 0x3c971814, 0x6b6a70a1,
+      0x687f3584, 0x52a0e286, 0xb79c5305, 0xaa500737, 0x3e07841c, 0x7fdeae5c,
+      0x8e7d44ec, 0x5716f2b8, 0xb03ada37, 0xf0500c0d, 0xf01c1f04, 0x0200b3ff,
+      0xae0cf51a, 0x3cb574b2, 0x25837a58, 0xdc0921bd, 0xd19113f9, 0x7ca92ff6,
+      0x94324773, 0x22f54701, 0x3ae5e581, 0x37c2dadc, 0xc8b57634, 0x9af3dda7,
+      0xa9446146, 0x0fd0030e, 0xecc8c73e, 0xa4751e41, 0xe238cd99, 0x3bea0e2f,
+      0x3280bba1, 0x183eb331, 0x4e548b38, 0x4f6db908, 0x6f420d03, 0xf60a04bf,
+      0x2cb81290, 0x24977c79, 0x5679b072, 0xbcaf89af, 0xde9a771f, 0xd9930810,
+      0xb38bae12, 0xdccf3f2e, 0x5512721f, 0x2e6b7124, 0x501adde6, 0x9f84cd87,
+      0x7a584718, 0x7408da17, 0xbc9f9abc, 0xe94b7d8c, 0xec7aec3a, 0xdb851dfa,
+      0x63094366, 0xc464c3d2, 0xef1c1847, 0x3215d908, 0xdd433b37, 0x24c2ba16,
+      0x12a14d43, 0x2a65c451, 0x50940002, 0x133ae4dd, 0x71dff89e, 0x10314e55,
+      0x81ac77d6, 0x5f11199b, 0x043556f1, 0xd7a3c76b, 0x3c11183b, 0x5924a509,
+      0xf28fe6ed, 0x97f1fbfa, 0x9ebabf2c, 0x1e153c6e, 0x86e34570, 0xeae96fb1,
+      0x860e5e0a, 0x5a3e2ab3, 0x771fe71c, 0x4e3d06fa, 0x2965dcb9, 0x99e71d0f,
+      0x803e89d6, 0x5266c825, 0x2e4cc978, 0x9c10b36a, 0xc6150eba, 0x94e2ea78,
+      0xa5fc3c53, 0x1e0a2df4, 0xf2f74ea7, 0x361d2b3d, 0x1939260f, 0x19c27960,
+      0x5223a708, 0xf71312b6, 0xebadfe6e, 0xeac31f66, 0xe3bc4595, 0xa67bc883,
+      0xb17f37d1, 0x018cff28, 0xc332ddef, 0xbe6c5aa5, 0x65582185, 0x68ab9802,
+      0xeecea50f, 0xdb2f953b, 0x2aef7dad, 0x5b6e2f84, 0x1521b628, 0x29076170,
+      0xecdd4775, 0x619f1510, 0x13cca830, 0xeb61bd96, 0x0334fe1e, 0xaa0363cf,
+      0xb5735c90, 0x4c70a239, 0xd59e9e0b, 0xcbaade14, 0xeecc86bc, 0x60622ca7,
+      0x9cab5cab, 0xb2f3846e, 0x648b1eaf, 0x19bdf0ca, 0xa02369b9, 0x655abb50,
+      0x40685a32, 0x3c2ab4b3, 0x319ee9d5, 0xc021b8f7, 0x9b540b19, 0x875fa099,
+      0x95f7997e, 0x623d7da8, 0xf837889a, 0x97e32d77, 0x11ed935f, 0x16681281,
+      0x0e358829, 0xc7e61fd6, 0x96dedfa1, 0x7858ba99, 0x57f584a5, 0x1b227263,
+      0x9b83c3ff, 0x1ac24696, 0xcdb30aeb, 0x532e3054, 0x8fd948e4, 0x6dbc3128,
+      0x58ebf2ef, 0x34c6ffea, 0xfe28ed61, 0xee7c3c73, 0x5d4a14d9, 0xe864b7e3,
+      0x42105d14, 0x203e13e0, 0x45eee2b6, 0xa3aaabea, 0xdb6c4f15, 0xfacb4fd0,
+      0xc742f442, 0xef6abbb5, 0x654f3b1d, 0x41cd2105, 0xd81e799e, 0x86854dc7,
+      0xe44b476a, 0x3d816250, 0xcf62a1f2, 0x5b8d2646, 0xfc8883a0, 0xc1c7b6a3,
+      0x7f1524c3, 0x69cb7492, 0x47848a0b, 0x5692b285, 0x095bbf00, 0xad19489d,
+      0x1462b174, 0x23820e00, 0x58428d2a, 0x0c55f5ea, 0x1dadf43e, 0x233f7061,
+      0x3372f092, 0x8d937e41, 0xd65fecf1, 0x6c223bdb, 0x7cde3759, 0xcbee7460,
+      0x4085f2a7, 0xce77326e, 0xa6078084, 0x19f8509e, 0xe8efd855, 0x61d99735,
+      0xa969a7aa, 0xc50c06c2, 0x5a04abfc, 0x800bcadc, 0x9e447a2e, 0xc3453484,
+      0xfdd56705, 0x0e1e9ec9, 0xdb73dbd3, 0x105588cd, 0x675fda79, 0xe3674340,
+      0xc5c43465, 0x713e38d8, 0x3d28f89e, 0xf16dff20, 0x153e21e7, 0x8fb03d4a,
+      0xe6e39f2b, 0xdb83adf7, 0xe93d5a68, 0x948140f7, 0xf64c261c, 0x94692934,
+      0x411520f7, 0x7602d4f7, 0xbcf46b2e, 0xd4a20068, 0xd4082471, 0x3320f46a,
+      0x43b7d4b7, 0x500061af, 0x1e39f62e, 0x97244546, 0x14214f74, 0xbf8b8840,
+      0x4d95fc1d, 0x96b591af, 0x70f4ddd3, 0x66a02f45, 0xbfbc09ec, 0x03bd9785,
+      0x7fac6dd0, 0x31cb8504, 0x96eb27b3, 0x55fd3941, 0xda2547e6, 0xabca0a9a,
+      0x28507825, 0x530429f4, 0x0a2c86da, 0xe9b66dfb, 0x68dc1462, 0xd7486900,
+      0x680ec0a4, 0x27a18dee, 0x4f3ffea2, 0xe887ad8c, 0xb58ce006, 0x7af4d6b6,
+      0xaace1e7c, 0xd3375fec, 0xce78a399, 0x406b2a42, 0x20fe9e35, 0xd9f385b9,
+      0xee39d7ab, 0x3b124e8b, 0x1dc9faf7, 0x4b6d1856, 0x26a36631, 0xeae397b2,
+      0x3a6efa74, 0xdd5b4332, 0x6841e7f7, 0xca7820fb, 0xfb0af54e, 0xd8feb397,
+      0x454056ac, 0xba489527, 0x55533a3a, 0x20838d87, 0xfe6ba9b7, 0xd096954b,
+      0x55a867bc, 0xa1159a58, 0xcca92963, 0x99e1db33, 0xa62a4a56, 0x3f3125f9,
+      0x5ef47e1c, 0x9029317c, 0xfdf8e802, 0x04272f70, 0x80bb155c, 0x05282ce3,
+      0x95c11548, 0xe4c66d22, 0x48c1133f, 0xc70f86dc, 0x07f9c9ee, 0x41041f0f,
+      0x404779a4, 0x5d886e17, 0x325f51eb, 0xd59bc0d1, 0xf2bcc18f, 0x41113564,
+      0x257b7834, 0x602a9c60, 0xdff8e8a3, 0x1f636c1b, 0x0e12b4c2, 0x02e1329e,
+      0xaf664fd1, 0xcad18115, 0x6b2395e0, 0x333e92e1, 0x3b240b62, 0xeebeb922,
+      0x85b2a20e, 0xe6ba0d99, 0xde720c8c, 0x2da2f728, 0xd0127845, 0x95b794fd,
+      0x647d0862, 0xe7ccf5f0, 0x5449a36f, 0x877d48fa, 0xc39dfd27, 0xf33e8d1e,
+      0x0a476341, 0x992eff74, 0x3a6f6eab, 0xf4f8fd37, 0xa812dc60, 0xa1ebddf8,
+      0x991be14c, 0xdb6e6b0d, 0xc67b5510, 0x6d672c37, 0x2765d43b, 0xdcd0e804,
+      0xf1290dc7, 0xcc00ffa3, 0xb5390f92, 0x690fed0b, 0x667b9ffb, 0xcedb7d9c,
+      0xa091cf0b, 0xd9155ea3, 0xbb132f88, 0x515bad24, 0x7b9479bf, 0x763bd6eb,
+      0x37392eb3, 0xcc115979, 0x8026e297, 0xf42e312d, 0x6842ada7, 0xc66a2b3b,
+      0x12754ccc, 0x782ef11c, 0x6a124237, 0xb79251e7, 0x06a1bbe6, 0x4bfb6350,
+      0x1a6b1018, 0x11caedfa, 0x3d25bdd8, 0xe2e1c3c9, 0x44421659, 0x0a121386,
+      0xd90cec6e, 0xd5abea2a, 0x64af674e, 0xda86a85f, 0xbebfe988, 0x64e4c3fe,
+      0x9dbc8057, 0xf0f7c086, 0x60787bf8, 0x6003604d, 0xd1fd8346, 0xf6381fb0,
+      0x7745ae04, 0xd736fccc, 0x83426b33, 0xf01eab71, 0xb0804187, 0x3c005e5f,
+      0x77a057be, 0xbde8ae24, 0x55464299, 0xbf582e61, 0x4e58f48f, 0xf2ddfda2,
+      0xf474ef38, 0x8789bdc2, 0x5366f9c3, 0xc8b38e74, 0xb475f255, 0x46fcd9b9,
+      0x7aeb2661, 0x8b1ddf84, 0x846a0e79, 0x915f95e2, 0x466e598e, 0x20b45770,
+      0x8cd55591, 0xc902de4c, 0xb90bace1, 0xbb8205d0, 0x11a86248, 0x7574a99e,
+      0xb77f19b6, 0xe0a9dc09, 0x662d09a1, 0xc4324633, 0xe85a1f02, 0x09f0be8c,
+      0x4a99a025, 0x1d6efe10, 0x1ab93d1d, 0x0ba5a4df, 0xa186f20f, 0x2868f169,
+      0xdcb7da83, 0x573906fe, 0xa1e2ce9b, 0x4fcd7f52, 0x50115e01, 0xa70683fa,
+      0xa002b5c4, 0x0de6d027, 0x9af88c27, 0x773f8641, 0xc3604c06, 0x61a806b5,
+      0xf0177a28, 0xc0f586e0, 0x006058aa, 0x30dc7d62, 0x11e69ed7, 0x2338ea63,
+      0x53c2dd94, 0xc2c21634, 0xbbcbee56, 0x90bcb6de, 0xebfc7da1, 0xce591d76,
+      0x6f05e409, 0x4b7c0188, 0x39720a3d, 0x7c927c24, 0x86e3725f, 0x724d9db9,
+      0x1ac15bb4, 0xd39eb8fc, 0xed545578, 0x08fca5b5, 0xd83d7cd3, 0x4dad0fc4,
+      0x1e50ef5e, 0xb161e6f8, 0xa28514d9, 0x6c51133c, 0x6fd5c7e7, 0x56e14ec4,
+      0x362abfce, 0xddc6c837, 0xd79a3234, 0x92638212, 0x670efa8e, 0x406000e0,
+      0x3a39ce37, 0xd3faf5cf, 0xabc27737, 0x5ac52d1b, 0x5cb0679e, 0x4fa33742,
+      0xd3822740, 0x99bc9bbe, 0xd5118e9d, 0xbf0f7315, 0xd62d1c7e, 0xc700c47b,
+      0xb78c1b6b, 0x21a19045, 0xb26eb1be, 0x6a366eb4, 0x5748ab2f, 0xbc946e79,
+      0xc6a376d2, 0x6549c2c8, 0x530ff8ee, 0x468dde7d, 0xd5730a1d, 0x4cd04dc6,
+      0x2939bbdb, 0xa9ba4650, 0xac9526e8, 0xbe5ee304, 0xa1fad5f0, 0x6a2d519a,
+      0x63ef8ce2, 0x9a86ee22, 0xc089c2b8, 0x43242ef6, 0xa51e03aa, 0x9cf2d0a4,
+      0x83c061ba, 0x9be96a4d, 0x8fe51550, 0xba645bd6, 0x2826a2f9, 0xa73a3ae1,
+      0x4ba99586, 0xef5562e9, 0xc72fefd3, 0xf752f7da, 0x3f046f69, 0x77fa0a59,
+      0x80e4a915, 0x87b08601, 0x9b09e6ad, 0x3b3ee593, 0xe990fd5a, 0x9e34d797,
+      0x2cf0b7d9, 0x022b8b51, 0x96d5ac3a, 0x017da67d, 0xd1cf3ed6, 0x7c7d2d28,
+      0x1f9f25cf, 0xadf2b89b, 0x5ad6b472, 0x5a88f54c, 0xe029ac71, 0xe019a5e6,
+      0x47b0acfd, 0xed93fa9b, 0xe8d3c48d, 0x283b57cc, 0xf8d56629, 0x79132e28,
+      0x785f0191, 0xed756055, 0xf7960e44, 0xe3d35e8c, 0x15056dd4, 0x88f46dba,
+      0x03a16125, 0x0564f0bd, 0xc3eb9e15, 0x3c9057a2, 0x97271aec, 0xa93a072a,
+      0x1b3f6d9b, 0x1e6321f5, 0xf59c66fb, 0x26dcf319, 0x7533d928, 0xb155fdf5,
+      0x03563482, 0x8aba3cbb, 0x28517711, 0xc20ad9f8, 0xabcc5167, 0xccad925f,
+      0x4de81751, 0x3830dc8e, 0x379d5862, 0x9320f991, 0xea7a90c2, 0xfb3e7bce,
+      0x5121ce64, 0x774fbe32, 0xa8b6e37e, 0xc3293d46, 0x48de5369, 0x6413e680,
+      0xa2ae0810, 0xdd6db224, 0x69852dfd, 0x09072166, 0xb39a460a, 0x6445c0dd,
+      0x586cdecf, 0x1c20c8ae, 0x5bbef7dd, 0x1b588d40, 0xccd2017f, 0x6bb4e3bb,
+      0xdda26a7e, 0x3a59ff45, 0x3e350a44, 0xbcb4cdd5, 0x72eacea8, 0xfa6484bb,
+      0x8d6612ae, 0xbf3c6f47, 0xd29be463, 0x542f5d9e, 0xaec2771b, 0xf64e6370,
+      0x740e0d8d, 0xe75b1357, 0xf8721671, 0xaf537d5d, 0x4040cb08, 0x4eb4e2cc,
+      0x34d2466a, 0x0115af84, 0xe1b00428, 0x95983a1d, 0x06b89fb4, 0xce6ea048,
+      0x6f3f3b82, 0x3520ab82, 0x011a1d4b, 0x277227f8, 0x611560b1, 0xe7933fdc,
+      0xbb3a792b, 0x344525bd, 0xa08839e1, 0x51ce794b, 0x2f32c9b7, 0xa01fbac9,
+      0xe01cc87e, 0xbcc7d1f6, 0xcf0111c3, 0xa1e8aac7, 0x1a908749, 0xd44fbd9a,
+      0xd0dadecb, 0xd50ada38, 0x0339c32a, 0xc6913667, 0x8df9317c, 0xe0b12b4f,
+      0xf79e59b7, 0x43f5bb3a, 0xf2d519ff, 0x27d9459c, 0xbf97222c, 0x15e6fc2a,
+      0x0f91fc71, 0x9b941525, 0xfae59361, 0xceb69ceb, 0xc2a86459, 0x12baa8d1,
+      0xb6c1075e, 0xe3056a0c, 0x10d25065, 0xcb03a442, 0xe0ec6e0e, 0x1698db3b,
+      0x4c98a0be, 0x3278e964, 0x9f1f9532, 0xe0d392df, 0xd3a0342b, 0x8971f21e,
+      0x1b0a7441, 0x4ba3348c, 0xc5be7120, 0xc37632d8, 0xdf359f8d, 0x9b992f2e,
+      0xe60b6f47, 0x0fe3f11d, 0xe54cda54, 0x1edad891, 0xce6279cf, 0xcd3e7e6f,
+      0x1618b166, 0xfd2c1d05, 0x848fd2c5, 0xf6fb2299, 0xf523f357, 0xa6327623,
+      0x93a83531, 0x56cccd02, 0xacf08162, 0x5a75ebb5, 0x6e163697, 0x88d273cc,
+      0xde966292, 0x81b949d0, 0x4c50901b, 0x71c65614, 0xe6c6c7bd, 0x327a140a,
+      0x45e1d006, 0xc3f27b9a, 0xc9aa53fd, 0x62a80f00, 0xbb25bfe2, 0x35bdd2f6,
+      0x71126905, 0xb2040222, 0xb6cbcf7c, 0xcd769c2b, 0x53113ec0, 0x1640e3d3,
+      0x38abbd60, 0x2547adf0, 0xba38209c, 0xf746ce76, 0x77afa1c5, 0x20756060,
+      0x85cbfe4e, 0x8ae88dd8, 0x7aaaf9b0, 0x4cf9aa7e, 0x1948c25c, 0x02fb8a8c,
+      0x01c36ae4, 0xd6ebe1f9, 0x90d4f869, 0xa65cdea0, 0x3f09252d, 0xc208e69f,
+      0xb74e6132, 0xce77e25b, 0x578fdfe3, 0x3ac372e6,
+    ];
+
+    /**
+     * @type {Array.<number>}
+     * @const
+     * @inner
+     */
+    var C_ORIG = [
+      0x4f727068, 0x65616e42, 0x65686f6c, 0x64657253, 0x63727944, 0x6f756274,
+    ];
+
+    /**
+     * @param {Array.<number>} lr
+     * @param {number} off
+     * @param {Array.<number>} P
+     * @param {Array.<number>} S
+     * @returns {Array.<number>}
+     * @inner
+     */
+    function _encipher(lr, off, P, S) {
+      // This is our bottleneck: 1714/1905 ticks / 90% - see profile.txt
+      var n,
+        l = lr[off],
+        r = lr[off + 1];
+      l ^= P[0];
+
+      /*
+      for (var i=0, k=BLOWFISH_NUM_ROUNDS-2; i<=k;)
+          // Feistel substitution on left word
+          n  = S[l >>> 24],
+          n += S[0x100 | ((l >> 16) & 0xff)],
+          n ^= S[0x200 | ((l >> 8) & 0xff)],
+          n += S[0x300 | (l & 0xff)],
+          r ^= n ^ P[++i],
+          // Feistel substitution on right word
+          n  = S[r >>> 24],
+          n += S[0x100 | ((r >> 16) & 0xff)],
+          n ^= S[0x200 | ((r >> 8) & 0xff)],
+          n += S[0x300 | (r & 0xff)],
+          l ^= n ^ P[++i];
+      */
+
+      //The following is an unrolled version of the above loop.
+      //Iteration 0
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[1];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[2];
+      //Iteration 1
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[3];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[4];
+      //Iteration 2
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[5];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[6];
+      //Iteration 3
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[7];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[8];
+      //Iteration 4
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[9];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[10];
+      //Iteration 5
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[11];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[12];
+      //Iteration 6
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[13];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[14];
+      //Iteration 7
+      n = S[l >>> 24];
+      n += S[0x100 | ((l >> 16) & 0xff)];
+      n ^= S[0x200 | ((l >> 8) & 0xff)];
+      n += S[0x300 | (l & 0xff)];
+      r ^= n ^ P[15];
+      n = S[r >>> 24];
+      n += S[0x100 | ((r >> 16) & 0xff)];
+      n ^= S[0x200 | ((r >> 8) & 0xff)];
+      n += S[0x300 | (r & 0xff)];
+      l ^= n ^ P[16];
+      lr[off] = r ^ P[BLOWFISH_NUM_ROUNDS + 1];
+      lr[off + 1] = l;
+      return lr;
+    }
+
+    /**
+     * @param {Array.<number>} data
+     * @param {number} offp
+     * @returns {{key: number, offp: number}}
+     * @inner
+     */
+    function _streamtoword(data, offp) {
+      for (var i = 0, word = 0; i < 4; ++i)
+        (word = (word << 8) | (data[offp] & 0xff)),
+          (offp = (offp + 1) % data.length);
+      return {
+        key: word,
+        offp: offp,
+      };
+    }
+
+    /**
+     * @param {Array.<number>} key
+     * @param {Array.<number>} P
+     * @param {Array.<number>} S
+     * @inner
+     */
+    function _key(key, P, S) {
+      var offset = 0,
+        lr = [0, 0],
+        plen = P.length,
+        slen = S.length,
+        sw;
+      for (var i = 0; i < plen; i++)
+        (sw = _streamtoword(key, offset)),
+          (offset = sw.offp),
+          (P[i] = P[i] ^ sw.key);
+      for (i = 0; i < plen; i += 2)
+        (lr = _encipher(lr, 0, P, S)), (P[i] = lr[0]), (P[i + 1] = lr[1]);
+      for (i = 0; i < slen; i += 2)
+        (lr = _encipher(lr, 0, P, S)), (S[i] = lr[0]), (S[i + 1] = lr[1]);
+    }
+
+    /**
+     * Expensive key schedule Blowfish.
+     * @param {Array.<number>} data
+     * @param {Array.<number>} key
+     * @param {Array.<number>} P
+     * @param {Array.<number>} S
+     * @inner
+     */
+    function _ekskey(data, key, P, S) {
+      var offp = 0,
+        lr = [0, 0],
+        plen = P.length,
+        slen = S.length,
+        sw;
+      for (var i = 0; i < plen; i++)
+        (sw = _streamtoword(key, offp)),
+          (offp = sw.offp),
+          (P[i] = P[i] ^ sw.key);
+      offp = 0;
+      for (i = 0; i < plen; i += 2)
+        (sw = _streamtoword(data, offp)),
+          (offp = sw.offp),
+          (lr[0] ^= sw.key),
+          (sw = _streamtoword(data, offp)),
+          (offp = sw.offp),
+          (lr[1] ^= sw.key),
+          (lr = _encipher(lr, 0, P, S)),
+          (P[i] = lr[0]),
+          (P[i + 1] = lr[1]);
+      for (i = 0; i < slen; i += 2)
+        (sw = _streamtoword(data, offp)),
+          (offp = sw.offp),
+          (lr[0] ^= sw.key),
+          (sw = _streamtoword(data, offp)),
+          (offp = sw.offp),
+          (lr[1] ^= sw.key),
+          (lr = _encipher(lr, 0, P, S)),
+          (S[i] = lr[0]),
+          (S[i + 1] = lr[1]);
+    }
+
+    /**
+     * Internaly crypts a string.
+     * @param {Array.<number>} b Bytes to crypt
+     * @param {Array.<number>} salt Salt bytes to use
+     * @param {number} rounds Number of rounds
+     * @param {function(Error, Array.<number>=)=} callback Callback receiving the error, if any, and the resulting bytes. If
+     *  omitted, the operation will be performed synchronously.
+     *  @param {function(number)=} progressCallback Callback called with the current progress
+     * @returns {!Array.<number>|undefined} Resulting bytes if callback has been omitted, otherwise `undefined`
+     * @inner
+     */
+    function _crypt(b, salt, rounds, callback, progressCallback) {
+      var cdata = C_ORIG.slice(),
+        clen = cdata.length,
+        err;
+
+      // Validate
+      if (rounds < 4 || rounds > 31) {
+        err = Error("Illegal number of rounds (4-31): " + rounds);
+        if (callback) {
+          nextTick(callback.bind(this, err));
+          return;
+        } else throw err;
+      }
+      if (salt.length !== BCRYPT_SALT_LEN) {
+        err = Error(
+          "Illegal salt length: " + salt.length + " != " + BCRYPT_SALT_LEN,
+        );
+        if (callback) {
+          nextTick(callback.bind(this, err));
+          return;
+        } else throw err;
+      }
+      rounds = (1 << rounds) >>> 0;
+      var P,
+        S,
+        i = 0,
+        j;
+
+      //Use typed arrays when available - huge speedup!
+      if (typeof Int32Array === "function") {
+        P = new Int32Array(P_ORIG);
+        S = new Int32Array(S_ORIG);
+      } else {
+        P = P_ORIG.slice();
+        S = S_ORIG.slice();
+      }
+      _ekskey(salt, b, P, S);
+
+      /**
+       * Calcualtes the next round.
+       * @returns {Array.<number>|undefined} Resulting array if callback has been omitted, otherwise `undefined`
+       * @inner
+       */
+      function next() {
+        if (progressCallback) progressCallback(i / rounds);
+        if (i < rounds) {
+          var start = Date.now();
+          for (; i < rounds; ) {
+            i = i + 1;
+            _key(b, P, S);
+            _key(salt, P, S);
+            if (Date.now() - start > MAX_EXECUTION_TIME) break;
+          }
+        } else {
+          for (i = 0; i < 64; i++)
+            for (j = 0; j < clen >> 1; j++) _encipher(cdata, j << 1, P, S);
+          var ret = [];
+          for (i = 0; i < clen; i++)
+            ret.push(((cdata[i] >> 24) & 0xff) >>> 0),
+              ret.push(((cdata[i] >> 16) & 0xff) >>> 0),
+              ret.push(((cdata[i] >> 8) & 0xff) >>> 0),
+              ret.push((cdata[i] & 0xff) >>> 0);
+          if (callback) {
+            callback(null, ret);
+            return;
+          } else return ret;
+        }
+        if (callback) nextTick(next);
+      }
+
+      // Async
+      if (typeof callback !== "undefined") {
+        next();
+
+        // Sync
+      } else {
+        var res;
+        while (true)
+          if (typeof (res = next()) !== "undefined") return res || [];
+      }
+    }
+
+    /**
+     * Internally hashes a password.
+     * @param {string} password Password to hash
+     * @param {?string} salt Salt to use, actually never null
+     * @param {function(Error, string=)=} callback Callback receiving the error, if any, and the resulting hash. If omitted,
+     *  hashing is performed synchronously.
+     *  @param {function(number)=} progressCallback Callback called with the current progress
+     * @returns {string|undefined} Resulting hash if callback has been omitted, otherwise `undefined`
+     * @inner
+     */
+    function _hash(password, salt, callback, progressCallback) {
+      var err;
+      if (typeof password !== "string" || typeof salt !== "string") {
+        err = Error("Invalid string / salt: Not a string");
+        if (callback) {
+          nextTick(callback.bind(this, err));
+          return;
+        } else throw err;
+      }
+
+      // Validate the salt
+      var minor, offset;
+      if (salt.charAt(0) !== "$" || salt.charAt(1) !== "2") {
+        err = Error("Invalid salt version: " + salt.substring(0, 2));
+        if (callback) {
+          nextTick(callback.bind(this, err));
+          return;
+        } else throw err;
+      }
+      if (salt.charAt(2) === "$")
+        (minor = String.fromCharCode(0)), (offset = 3);
+      else {
+        minor = salt.charAt(2);
+        if (
+          (minor !== "a" && minor !== "b" && minor !== "y") ||
+          salt.charAt(3) !== "$"
+        ) {
+          err = Error("Invalid salt revision: " + salt.substring(2, 4));
+          if (callback) {
+            nextTick(callback.bind(this, err));
+            return;
+          } else throw err;
+        }
+        offset = 4;
+      }
+
+      // Extract number of rounds
+      if (salt.charAt(offset + 2) > "$") {
+        err = Error("Missing salt rounds");
+        if (callback) {
+          nextTick(callback.bind(this, err));
+          return;
+        } else throw err;
+      }
+      var r1 = parseInt(salt.substring(offset, offset + 1), 10) * 10,
+        r2 = parseInt(salt.substring(offset + 1, offset + 2), 10),
+        rounds = r1 + r2,
+        real_salt = salt.substring(offset + 3, offset + 25);
+      password += minor >= "a" ? "\x00" : "";
+      var passwordb = utf8Array(password),
+        saltb = base64_decode(real_salt, BCRYPT_SALT_LEN);
+
+      /**
+       * Finishes hashing.
+       * @param {Array.<number>} bytes Byte array
+       * @returns {string}
+       * @inner
+       */
+      function finish(bytes) {
+        var res = [];
+        res.push("$2");
+        if (minor >= "a") res.push(minor);
+        res.push("$");
+        if (rounds < 10) res.push("0");
+        res.push(rounds.toString());
+        res.push("$");
+        res.push(base64_encode(saltb, saltb.length));
+        res.push(base64_encode(bytes, C_ORIG.length * 4 - 1));
+        return res.join("");
+      }
+
+      // Sync
+      if (typeof callback == "undefined")
+        return finish(_crypt(passwordb, saltb, rounds));
+      // Async
+      else {
+        _crypt(
+          passwordb,
+          saltb,
+          rounds,
+          function (err, bytes) {
+            if (err) callback(err, null);
+            else callback(null, finish(bytes));
+          },
+          progressCallback,
+        );
+      }
+    }
+
+    /**
+     * Encodes a byte array to base64 with up to len bytes of input, using the custom bcrypt alphabet.
+     * @function
+     * @param {!Array.<number>} bytes Byte array
+     * @param {number} length Maximum input length
+     * @returns {string}
+     */
+    function encodeBase64(bytes, length) {
+      return base64_encode(bytes, length);
+    }
+
+    /**
+     * Decodes a base64 encoded string to up to len bytes of output, using the custom bcrypt alphabet.
+     * @function
+     * @param {string} string String to decode
+     * @param {number} length Maximum output length
+     * @returns {!Array.<number>}
+     */
+    function decodeBase64(string, length) {
+      return base64_decode(string, length);
+    }
+    var _default = (_exports.default = {
+      setRandomFallback,
+      genSaltSync,
+      genSalt,
+      hashSync,
+      hash,
+      compareSync,
+      compare,
+      getRounds,
+      getSalt,
+      truncates,
+      encodeBase64,
+      decodeBase64,
+    });
+  },
+);
diff --git a/docs/static/js/config-generator.js b/docs/static/js/config-generator.js
new file mode 100644
index 00000000..7c093ead
--- /dev/null
+++ b/docs/static/js/config-generator.js
@@ -0,0 +1,1357 @@
+// Config Generator for ntfy
+//
+// Warning, AI code
+// ----------------
+// This code is entirely AI generated, but this very comment is not. Phil wrote this. Hi!
+// I felt like the Config Generator was a great feature to have, but it would have taken me forever
+// to write this code without AI. I reviewed the code manually, and it doesn't do anything dangerous.
+// It's not the greatest code, but it works well enough to deliver value, and that's what it's all about.
+//
+// End of human comment. ;)
+//
+// How it works
+// ------------
+// The generator is a modal with a left panel (form inputs) and a right panel (live output).
+// On every input change, the update cycle runs: updateVisibility() syncs the UI state, then
+// updateOutput() collects values from the form and renders them as server.yml, docker-compose.yml,
+// or env vars.
+//
+// The CONFIG array is the source of truth for which config keys exist, their env var names,
+// which section they belong to, and optional defaults. collectValues() walks CONFIG, reads each
+// matching DOM element, skips anything in a hidden panel or section, and returns a plain
+// {key: value} object. The three generators (generateServerYml, generateDockerCompose,
+// generateEnvVars) each iterate CONFIG in order and format the collected values. Provisioned
+// users, ACLs, and tokens are collected separately from repeatable rows and stored as arrays
+// under "_auth-users", "_auth-acls", "_auth-tokens". The formatAuthUsers/Acls/Tokens() helpers
+// turn those arrays into "user:pass:role" strings shared by all three generators.
+//
+// Visibility is managed by updateVisibility(), which delegates to five helpers:
+// syncRadiosToHiddenInputs() copies user-facing radios and selects to hidden inputs that CONFIG
+// knows about (e.g. login mode radio → enable-login + require-login checkboxes).
+// updateFeatureVisibility() shows/hides nav tabs, configure buttons, and email sections based
+// on which feature checkboxes are checked. updatePostgresFields() swaps file-path inputs for
+// "Using PostgreSQL" labels when PostgreSQL is selected. prefillDefaults() sets sensible values
+// (file paths, addresses) when a feature is first enabled, tracked via a data-cleared attribute
+// so user edits are respected. autoDetectServerType() flips the server-type radio to "custom"
+// if the user's access/login settings no longer match "open" or "private".
+//
+// Event listeners are grouped into setup functions (setupModalEvents, setupAuthEvents,
+// setupServerTypeEvents, setupUnifiedPushEvents, setupFormListeners, setupWebPushEvents)
+// called from initGenerator().
+// A general listener on all inputs calls the update cycle. Specific listeners handle cleanup
+// logic, e.g. unchecking auth resets all auth-related fields and provisioned rows.
+//
+// Frequently-used DOM elements are queried once in cacheElements() and passed around as an
+// `els` object, avoiding repeated querySelector calls.
+//
+// Field inter-dependencies
+// ------------------------
+// Several UI fields don't map 1:1 to config keys. Instead, user-friendly controls drive
+// hidden inputs that CONFIG knows about. The sync happens in syncRadiosToHiddenInputs(),
+// called on every change via updateVisibility().
+//
+//   Server type (Open / Private / Custom)
+//     "Open"    → unchecks auth, sets default-access to read-write, login to disabled
+//     "Private" → checks auth, sets default-access to deny-all, login to required
+//     "Custom"  → no automatic changes; also auto-selected when the user manually
+//                  changes access/login to values that don't match Open or Private
+//
+//   Auth checkbox (#cg-feat-auth)
+//     When unchecked → resets: default-access to read-write, login to disabled,
+//       signup to no, UnifiedPush to no, removes all provisioned users/ACLs/tokens,
+//       clears auth-file, switches server type back to Open.
+//       Also explicitly unchecks hidden enable-login, require-login, enable-signup.
+//     When checked by PostgreSQL auto-enable → no reset, just enables the tab.
+//
+//   Login mode (Disabled / Enabled / Required) — three-way radio
+//     Maps to two hidden checkboxes:
+//       enable-login  = checked when Enabled OR Required
+//       require-login = checked when Required only
+//
+//   Signup (Yes / No) — radio pair
+//     Maps to hidden enable-signup checkbox.
+//
+//   Proxy (Yes / No) — radio pair
+//     Maps to hidden behind-proxy checkbox.
+//
+//   iOS support (Yes / No) — radio pair
+//     Sets upstream-base-url to "https://ntfy.sh" when Yes, clears when No.
+//
+//   UnifiedPush (Yes / No) — radio pair
+//     When Yes, enables auth (if not already on) and adds a disabled "*:up*:write-only"
+//     ACL row to the Users tab. The row's fields are grayed out and non-editable. It is
+//     collected like any other ACL row. Clicking its [x] removes the row and toggles
+//     UnifiedPush back to No.
+//
+//   Database type (SQLite / PostgreSQL)
+//     When PostgreSQL is selected:
+//       - Auto-enables auth if not already on
+//       - Hides file-path fields (auth-file, cache-file, web-push-file) and shows
+//         "Using PostgreSQL" labels instead
+//       - Shows the Database nav tab for the database-url field
+//       - Prefills database-url with a postgres:// template
+//     The database question itself only appears when a DB-dependent feature
+//     (auth, cache, or web push) is enabled.
+//
+//   Feature checkboxes (auth, cache, attachments, web push, email out, email in)
+//     Each shows/hides its nav tab and "Configure" button.
+//     When first enabled, prefillDefaults() fills in sensible paths/values.
+//     The prefill is skipped if the user has already typed (or cleared) the field
+//     (tracked via data-cleared attribute).
+//
+(function() {
+  "use strict";
+
+  const CONFIG = [
+    { key: "base-url", env: "NTFY_BASE_URL", section: "basic" },
+    { key: "behind-proxy", env: "NTFY_BEHIND_PROXY", section: "basic", type: "bool" },
+    { key: "database-url", env: "NTFY_DATABASE_URL", section: "database" },
+    { key: "auth-file", env: "NTFY_AUTH_FILE", section: "auth" },
+    { key: "auth-default-access", env: "NTFY_AUTH_DEFAULT_ACCESS", section: "auth", def: "read-write" },
+    { key: "enable-login", env: "NTFY_ENABLE_LOGIN", section: "auth", type: "bool" },
+    { key: "require-login", env: "NTFY_REQUIRE_LOGIN", section: "auth", type: "bool" },
+    { key: "enable-signup", env: "NTFY_ENABLE_SIGNUP", section: "auth", type: "bool" },
+    { key: "attachment-cache-dir", env: "NTFY_ATTACHMENT_CACHE_DIR", section: "attach" },
+    { key: "attachment-file-size-limit", env: "NTFY_ATTACHMENT_FILE_SIZE_LIMIT", section: "attach", def: "15M" },
+    { key: "attachment-total-size-limit", env: "NTFY_ATTACHMENT_TOTAL_SIZE_LIMIT", section: "attach", def: "5G" },
+    { key: "attachment-expiry-duration", env: "NTFY_ATTACHMENT_EXPIRY_DURATION", section: "attach", def: "3h" },
+    { key: "cache-file", env: "NTFY_CACHE_FILE", section: "cache" },
+    { key: "cache-duration", env: "NTFY_CACHE_DURATION", section: "cache", def: "12h" },
+    { key: "web-push-public-key", env: "NTFY_WEB_PUSH_PUBLIC_KEY", section: "webpush" },
+    { key: "web-push-private-key", env: "NTFY_WEB_PUSH_PRIVATE_KEY", section: "webpush" },
+    { key: "web-push-file", env: "NTFY_WEB_PUSH_FILE", section: "webpush" },
+    { key: "web-push-email-address", env: "NTFY_WEB_PUSH_EMAIL_ADDRESS", section: "webpush" },
+    { key: "smtp-sender-addr", env: "NTFY_SMTP_SENDER_ADDR", section: "smtp-out" },
+    { key: "smtp-sender-from", env: "NTFY_SMTP_SENDER_FROM", section: "smtp-out" },
+    { key: "smtp-sender-user", env: "NTFY_SMTP_SENDER_USER", section: "smtp-out" },
+    { key: "smtp-sender-pass", env: "NTFY_SMTP_SENDER_PASS", section: "smtp-out" },
+    { key: "smtp-server-listen", env: "NTFY_SMTP_SERVER_LISTEN", section: "smtp-in" },
+    { key: "smtp-server-domain", env: "NTFY_SMTP_SERVER_DOMAIN", section: "smtp-in" },
+    { key: "smtp-server-addr-prefix", env: "NTFY_SMTP_SERVER_ADDR_PREFIX", section: "smtp-in" },
+    { key: "upstream-base-url", env: "NTFY_UPSTREAM_BASE_URL", section: "upstream" }
+  ];
+
+  // Feature checkbox → nav tab ID
+  const NAV_MAP = {
+    "cg-feat-auth": "cg-nav-auth",
+    "cg-feat-cache": "cg-nav-cache",
+    "cg-feat-attach": "cg-nav-attach",
+    "cg-feat-webpush": "cg-nav-webpush"
+  };
+
+  const SECTION_COMMENTS = {
+    basic: "# Server",
+    database: "# Database",
+    auth: "# Access control",
+    attach: "# Attachments",
+    cache: "# Message cache",
+    webpush: "# Web push",
+    "smtp-out": "# Email notifications (outgoing)",
+    "smtp-in": "# Email publishing (incoming)",
+    upstream: "# Upstream"
+  };
+
+  const durationRegex = /^(\d+)\s*(d|days?|h|hours?|m|mins?|minutes?|s|secs?|seconds?)$/i;
+  const sizeRegex = /^(\d+)([tgmkb])?$/i;
+
+  // --- DOM cache ---
+
+  function cacheElements(modal) {
+    return {
+      modal,
+      authCheckbox: modal.querySelector("#cg-feat-auth"),
+      cacheCheckbox: modal.querySelector("#cg-feat-cache"),
+      attachCheckbox: modal.querySelector("#cg-feat-attach"),
+      webpushCheckbox: modal.querySelector("#cg-feat-webpush"),
+      smtpOutCheckbox: modal.querySelector("#cg-feat-smtp-out"),
+      smtpInCheckbox: modal.querySelector("#cg-feat-smtp-in"),
+      accessSelect: modal.querySelector("#cg-default-access-select"),
+      accessHidden: modal.querySelector("input[type=\"hidden\"][data-key=\"auth-default-access\"]"),
+      loginHidden: modal.querySelector("#cg-enable-login-hidden"),
+      requireLoginHidden: modal.querySelector("#cg-require-login-hidden"),
+      signupHidden: modal.querySelector("#cg-enable-signup-hidden"),
+      proxyCheckbox: modal.querySelector("#cg-behind-proxy"),
+      dbStep: modal.querySelector("#cg-wizard-db"),
+      navDb: modal.querySelector("#cg-nav-database"),
+      navEmail: modal.querySelector("#cg-nav-email"),
+      emailOutSection: modal.querySelector("#cg-email-out-section"),
+      emailInSection: modal.querySelector("#cg-email-in-section"),
+      codeEl: modal.querySelector("#cg-code"),
+      warningsEl: modal.querySelector("#cg-warnings")
+    };
+  }
+
+  // --- Collect values ---
+
+  function collectValues(els) {
+    const { modal } = els;
+    const values = {};
+
+    CONFIG.forEach((c) => {
+      const el = modal.querySelector(`[data-key="${c.key}"]`);
+      if (!el) return;
+
+      // Skip fields in hidden panels (feature not enabled)
+      const panel = el.closest(".cg-panel");
+      if (panel) {
+        // Panel hidden directly
+        if (panel.style.display === "none" || panel.classList.contains("cg-hidden")) return;
+        // Panel with a nav tab that is hidden (feature not enabled)
+        if (!panel.classList.contains("active")) {
+          const panelId = panel.id;
+          const navTab = modal.querySelector(`[data-panel="${panelId}"]`);
+          if (!navTab || navTab.classList.contains("cg-hidden")) return;
+        }
+      }
+
+      // Skip file inputs replaced by PostgreSQL
+      if (el.dataset.pgDisabled) return;
+
+      // Skip hidden individual fields or sections
+      let ancestor = el.parentElement;
+      while (ancestor && ancestor !== modal) {
+        if (ancestor.style.display === "none" || ancestor.classList.contains("cg-hidden")) return;
+        ancestor = ancestor.parentElement;
+      }
+
+      let val;
+      if (c.type === "bool") {
+        if (el.checked) val = "true";
+      } else {
+        val = el.value.trim();
+        if (!val) return;
+      }
+      if (val && c.def && val === c.def) return;
+      if (val) values[c.key] = val;
+    });
+
+    // Provisioned users
+    const users = collectRepeatableRows(modal, ".cg-auth-user-row", (row) => {
+      const u = row.querySelector("[data-field=\"username\"]");
+      const p = row.querySelector("[data-field=\"password\"]");
+      const r = row.querySelector("[data-field=\"role\"]");
+      if (u && p && u.value.trim() && p.value.trim()) {
+        return { username: u.value.trim(), password: p.value.trim(), role: r ? r.value : "user" };
+      }
+      return null;
+    });
+    if (users.length) values["_auth-users"] = users;
+
+    // Provisioned ACLs
+    const acls = collectRepeatableRows(modal, ".cg-auth-acl-row", (row) => {
+      const u = row.querySelector("[data-field=\"username\"]");
+      const t = row.querySelector("[data-field=\"topic\"]");
+      const p = row.querySelector("[data-field=\"permission\"]");
+      if (u && t && t.value.trim()) {
+        return { user: u.value.trim(), topic: t.value.trim(), permission: p ? p.value : "read-write" };
+      }
+      return null;
+    });
+    if (acls.length) values["_auth-acls"] = acls;
+
+    // Provisioned tokens
+    const tokens = collectRepeatableRows(modal, ".cg-auth-token-row", (row) => {
+      const u = row.querySelector("[data-field=\"username\"]");
+      const t = row.querySelector("[data-field=\"token\"]");
+      const l = row.querySelector("[data-field=\"label\"]");
+      if (u && t && u.value.trim() && t.value.trim()) {
+        return { user: u.value.trim(), token: t.value.trim(), label: l ? l.value.trim() : "" };
+      }
+      return null;
+    });
+    if (tokens.length) values["_auth-tokens"] = tokens;
+
+    return values;
+  }
+
+  function collectRepeatableRows(modal, selector, extractor) {
+    const results = [];
+    modal.querySelectorAll(selector).forEach((row) => {
+      const item = extractor(row);
+      if (item) results.push(item);
+    });
+    return results;
+  }
+
+  // --- Shared auth formatting ---
+
+  const bcryptCache = {};
+
+  function hashPassword(username, password) {
+    if (password.startsWith("$2")) return password; // already a bcrypt hash
+    const cacheKey = username + "\0" + password;
+    if (bcryptCache[cacheKey]) return bcryptCache[cacheKey];
+    const hash = (typeof bcrypt !== "undefined") ? bcrypt.hashSync(password, 10) : password;
+    bcryptCache[cacheKey] = hash;
+    return hash;
+  }
+
+  function formatAuthUsers(values) {
+    if (!values["_auth-users"]) return null;
+    return values["_auth-users"].map((u) => `${u.username}:${hashPassword(u.username, u.password)}:${u.role}`);
+  }
+
+  function formatAuthAcls(values) {
+    if (!values["_auth-acls"]) return null;
+    return values["_auth-acls"].map((a) => `${a.user || "*"}:${a.topic}:${a.permission}`);
+  }
+
+  function formatAuthTokens(values) {
+    if (!values["_auth-tokens"]) return null;
+    return values["_auth-tokens"].map((t) => t.label ? `${t.user}:${t.token}:${t.label}` : `${t.user}:${t.token}`);
+  }
+
+  // --- Output generators ---
+
+  function generateServerYml(values) {
+    const lines = [];
+    let lastSection = "";
+    let hadAuth = false;
+
+    CONFIG.forEach((c) => {
+      if (!(c.key in values)) return;
+      if (c.section !== lastSection) {
+        if (lines.length) lines.push("");
+        if (SECTION_COMMENTS[c.section]) lines.push(SECTION_COMMENTS[c.section]);
+        lastSection = c.section;
+      }
+      if (c.section === "auth") hadAuth = true;
+      const val = values[c.key];
+      lines.push(c.type === "bool" ? `${c.key}: true` : `${c.key}: "${escapeYamlValue(val)}"`);
+    });
+
+    // Find insertion point for auth-users/auth-access/auth-tokens:
+    // right after the last "auth-" prefixed line, before enable-*/require-* lines
+    let authInsertIdx = lines.length;
+    if (hadAuth) {
+      for (let i = 0; i < lines.length; i++) {
+        if (lines[i] === "# Access control") {
+          // Find the last auth-* prefixed key in this section
+          let lastAuthKey = i;
+          for (let j = i + 1; j < lines.length; j++) {
+            if (lines[j].startsWith("# ")) break;
+            if (lines[j].startsWith("auth-")) lastAuthKey = j;
+          }
+          authInsertIdx = lastAuthKey + 1;
+          break;
+        }
+      }
+    }
+
+    const authExtra = [];
+    const users = formatAuthUsers(values);
+    if (users) {
+      if (!hadAuth) {
+        authExtra.push("");
+        authExtra.push("# Access control");
+        hadAuth = true;
+      }
+      authExtra.push("auth-users:");
+      users.forEach((entry) => authExtra.push(`  - "${escapeYamlValue(entry)}"`));
+    }
+
+    const acls = formatAuthAcls(values);
+    if (acls) {
+      if (!hadAuth) {
+        authExtra.push("");
+        authExtra.push("# Access control");
+        hadAuth = true;
+      }
+      authExtra.push("auth-access:");
+      acls.forEach((entry) => authExtra.push(`  - "${escapeYamlValue(entry)}"`));
+    }
+
+    const tokens = formatAuthTokens(values);
+    if (tokens) {
+      if (!hadAuth) {
+        authExtra.push("");
+        authExtra.push("# Access control");
+        hadAuth = true;
+      }
+      authExtra.push("auth-tokens:");
+      tokens.forEach((entry) => authExtra.push(`  - "${escapeYamlValue(entry)}"`));
+    }
+
+    // Splice auth extras into the right position
+    if (authExtra.length) {
+      lines.splice(authInsertIdx, 0, ...authExtra);
+    }
+
+    return lines.join("\n");
+  }
+
+  function generateDockerCompose(values) {
+    const lines = [
+      "services:",
+      "  ntfy:",
+      "    image: binwiederhier/ntfy",
+      "    command: serve",
+      "    environment:"
+    ];
+
+    let hasDollarNote = false;
+    CONFIG.forEach((c) => {
+      if (!(c.key in values)) return;
+      let val = c.type === "bool" ? "true" : values[c.key];
+      if (val.includes("$")) {
+        val = val.replace(/\$/g, "$$$$");
+        hasDollarNote = true;
+      }
+      lines.push(`      ${c.env}: "${escapeYamlValue(val)}"`);
+    });
+
+    const users = formatAuthUsers(values);
+    if (users) {
+      let usersVal = users.join(",");
+      usersVal = usersVal.replace(/\$/g, "$$$$");
+      hasDollarNote = true;
+      lines.push(`      NTFY_AUTH_USERS: "${escapeYamlValue(usersVal)}"`);
+    }
+
+    const acls = formatAuthAcls(values);
+    if (acls) {
+      lines.push(`      NTFY_AUTH_ACCESS: "${escapeYamlValue(acls.join(","))}"`);
+    }
+
+    const tokens = formatAuthTokens(values);
+    if (tokens) {
+      lines.push(`      NTFY_AUTH_TOKENS: "${escapeYamlValue(tokens.join(","))}"`);
+    }
+
+    if (hasDollarNote) {
+      // Insert note after "environment:" line
+      const envIdx = lines.indexOf("    environment:");
+      if (envIdx !== -1) {
+        lines.splice(envIdx + 1, 0, "      # Note: $ is doubled to $$ for docker-compose");
+      }
+    }
+
+    // Derive volumes from configured file/directory paths
+    const dirs = new Set();
+    ["auth-file", "cache-file", "web-push-file"].forEach((key) => {
+      if (values[key]) {
+        const dir = values[key].substring(0, values[key].lastIndexOf("/"));
+        if (dir) dirs.add(dir);
+      }
+    });
+    if (values["attachment-cache-dir"]) {
+      dirs.add(values["attachment-cache-dir"]);
+    }
+
+    if (dirs.size) {
+      lines.push("    volumes:");
+      [...dirs].sort().forEach((dir) => {
+        lines.push(`      - ${dir}:${dir}`);
+      });
+    }
+
+    lines.push(
+      "    ports:",
+      "      - \"80:80\"",
+      "    restart: unless-stopped"
+    );
+
+    return lines.join("\n");
+  }
+
+  function generateEnvVars(values) {
+    const lines = [];
+
+    CONFIG.forEach((c) => {
+      if (!(c.key in values)) return;
+      const val = c.type === "bool" ? "true" : values[c.key];
+      lines.push(`${c.env}=${escapeShellValue(val)}`);
+    });
+
+    const users = formatAuthUsers(values);
+    if (users) {
+      lines.push(`NTFY_AUTH_USERS=${escapeShellValue(users.join(","))}`);
+    }
+
+    const acls = formatAuthAcls(values);
+    if (acls) {
+      lines.push(`NTFY_AUTH_ACCESS=${escapeShellValue(acls.join(","))}`);
+    }
+
+    const tokens = formatAuthTokens(values);
+    if (tokens) {
+      lines.push(`NTFY_AUTH_TOKENS=${escapeShellValue(tokens.join(","))}`);
+    }
+
+    return lines.join("\n");
+  }
+
+  // --- Web Push VAPID key generation (P-256 ECDH) ---
+
+  function generateVAPIDKeys() {
+    return crypto.subtle.generateKey(
+      { name: "ECDH", namedCurve: "P-256" },
+      true,
+      ["deriveBits"]
+    ).then((keyPair) => {
+      return Promise.all([
+        crypto.subtle.exportKey("raw", keyPair.publicKey),
+        crypto.subtle.exportKey("pkcs8", keyPair.privateKey)
+      ]);
+    }).then((keys) => {
+      const pubBytes = new Uint8Array(keys[0]);
+      const privPkcs8 = new Uint8Array(keys[1]);
+      // Extract raw 32-byte private key from PKCS#8 (last 32 bytes of the DER)
+      const privBytes = privPkcs8.slice(privPkcs8.length - 32);
+      return {
+        publicKey: arrayToBase64Url(pubBytes),
+        privateKey: arrayToBase64Url(privBytes)
+      };
+    });
+  }
+
+  function arrayToBase64Url(arr) {
+    let str = "";
+    for (let i = 0; i < arr.length; i++) {
+      str += String.fromCharCode(arr[i]);
+    }
+    return btoa(str).replace(/\+/g, "-").replace(/\//g, "_").replace(/=+$/, "");
+  }
+
+  // --- Output + validation ---
+
+  function updateOutput(els) {
+    const { modal, codeEl, warningsEl } = els;
+    if (!codeEl) return;
+
+    const values = collectValues(els);
+    const activeTab = modal.querySelector(".cg-output-tab.active");
+    const format = activeTab ? activeTab.getAttribute("data-format") : "server-yml";
+
+    const hasValues = Object.keys(values).length > 0;
+    if (!hasValues) {
+      codeEl.innerHTML = "<span class=\"cg-empty-msg\">Configure options on the left to generate your config...</span>";
+      setHidden(warningsEl, true);
+      return;
+    }
+
+    let output;
+    if (format === "docker-compose") {
+      output = generateDockerCompose(values);
+    } else if (format === "env-vars") {
+      output = generateEnvVars(values);
+    } else {
+      output = generateServerYml(values);
+    }
+
+    codeEl.textContent = output;
+
+    // Validation warnings
+    const warnings = validate(values);
+    if (warningsEl) {
+      if (warnings.length) {
+        warningsEl.innerHTML = warnings.map((w) => `<div class="cg-warning">${w}</div>`).join("");
+      }
+      setHidden(warningsEl, !warnings.length);
+    }
+  }
+
+  function validate(values) {
+    const warnings = [];
+    const baseUrl = values["base-url"] || "";
+
+    // base-url format
+    if (baseUrl) {
+      if (!baseUrl.startsWith("http://") && !baseUrl.startsWith("https://")) {
+        warnings.push("base-url must start with http:// or https://");
+      } else {
+        try {
+          const u = new URL(baseUrl);
+          if (u.pathname !== "/" && u.pathname !== "") {
+            warnings.push("base-url must not have a path, ntfy does not support sub-paths");
+          }
+        } catch (e) {
+          warnings.push("base-url is not a valid URL");
+        }
+      }
+    }
+
+    // database-url must start with postgres://
+    if (values["database-url"] && !values["database-url"].startsWith("postgres://")) {
+      warnings.push("database-url must start with postgres://");
+    }
+
+    // Web push requires all fields + base-url
+    const wpPublic = values["web-push-public-key"];
+    const wpPrivate = values["web-push-private-key"];
+    const wpEmail = values["web-push-email-address"];
+    const wpFile = values["web-push-file"];
+    const dbUrl = values["database-url"];
+    if (wpPublic || wpPrivate || wpEmail) {
+      const missing = [];
+      if (!wpPublic) missing.push("web-push-public-key");
+      if (!wpPrivate) missing.push("web-push-private-key");
+      if (!wpFile && !dbUrl) missing.push("web-push-file or database-url");
+      if (!wpEmail) missing.push("web-push-email-address");
+      if (!baseUrl) missing.push("base-url");
+      if (missing.length) {
+        warnings.push(`Web push requires: ${missing.join(", ")}`);
+      }
+    }
+
+    // SMTP sender requires base-url and smtp-sender-from
+    if (values["smtp-sender-addr"]) {
+      const smtpMissing = [];
+      if (!baseUrl) smtpMissing.push("base-url");
+      if (!values["smtp-sender-from"]) smtpMissing.push("smtp-sender-from");
+      if (smtpMissing.length) {
+        warnings.push(`Email sending requires: ${smtpMissing.join(", ")}`);
+      }
+    }
+
+    // SMTP server requires domain
+    if (values["smtp-server-listen"] && !values["smtp-server-domain"]) {
+      warnings.push("Email publishing requires smtp-server-domain");
+    }
+
+    // Attachments require base-url
+    if (values["attachment-cache-dir"] && !baseUrl) {
+      warnings.push("Attachments require base-url to be set");
+    }
+
+    // Upstream requires base-url and can't equal it
+    if (values["upstream-base-url"]) {
+      if (!baseUrl) {
+        warnings.push("Upstream server requires base-url to be set");
+      } else if (baseUrl === values["upstream-base-url"]) {
+        warnings.push("base-url and upstream-base-url cannot be the same");
+      }
+    }
+
+    // enable-signup requires enable-login
+    if (values["enable-signup"] && !values["enable-login"]) {
+      warnings.push("Enable signup requires enable-login to also be set");
+    }
+
+    // Duration field validation
+    [
+      { key: "cache-duration", label: "Cache duration" },
+      { key: "attachment-expiry-duration", label: "Attachment expiry duration" }
+    ].forEach((f) => {
+      if (values[f.key] && !durationRegex.test(values[f.key])) {
+        warnings.push(`${f.label} must be a valid duration (e.g. 12h, 3d, 30m, 60s)`);
+      }
+    });
+
+    // Size field validation
+    [
+      { key: "attachment-file-size-limit", label: "Attachment file size limit" },
+      { key: "attachment-total-size-limit", label: "Attachment total size limit" }
+    ].forEach((f) => {
+      if (values[f.key] && !sizeRegex.test(values[f.key])) {
+        warnings.push(`${f.label} must be a valid size (e.g. 15M, 5G, 100K)`);
+      }
+    });
+
+    return warnings;
+  }
+
+  // --- Helpers ---
+
+  function secureRandomInt(max) {
+    const arr = new Uint32Array(1);
+    crypto.getRandomValues(arr);
+    return arr[0] % max;
+  }
+
+  function generateToken() {
+    const chars = "abcdefghijklmnopqrstuvwxyz0123456789";
+    let token = "tk_";
+    for (let i = 0; i < 29; i++) {
+      token += chars.charAt(secureRandomInt(chars.length));
+    }
+    return token;
+  }
+
+  function generatePassword() {
+    const chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+    let password = "";
+    for (let i = 0; i < 16; i++) {
+      password += chars.charAt(secureRandomInt(chars.length));
+    }
+    return password;
+  }
+
+  function escapeHtml(str) {
+    return str.replace(/&/g, "&amp;").replace(/"/g, "&quot;").replace(/</g, "&lt;").replace(/>/g, "&gt;");
+  }
+
+  function escapeYamlValue(str) {
+    return str.replace(/\\/g, "\\\\").replace(/"/g, '\\"');
+  }
+
+  function escapeShellValue(val) {
+    // Use single quotes for values with $, double quotes otherwise
+    // Escape the chosen quote character within the value
+    if (val.includes("$")) {
+      return "'" + val.replace(/'/g, "'\\''") + "'";
+    }
+    return '"' + val.replace(/\\/g, "\\\\").replace(/"/g, '\\"') + '"';
+  }
+
+  function prefill(modal, key, value) {
+    const el = modal.querySelector(`[data-key="${key}"]`);
+    if (el && !el.value.trim() && !el.dataset.cleared) el.value = value;
+  }
+
+  function switchPanel(modal, panelId) {
+    modal.querySelectorAll(".cg-nav-tab").forEach((t) => t.classList.remove("active"));
+    modal.querySelectorAll(".cg-panel").forEach((p) => p.classList.remove("active"));
+
+    const navTab = modal.querySelector(`[data-panel="${panelId}"]`);
+    const panel = modal.querySelector(`#${panelId}`);
+    if (navTab) navTab.classList.add("active");
+    if (panel) panel.classList.add("active");
+  }
+
+  function setHidden(el, hidden) {
+    if (!el) return;
+    if (hidden) {
+      el.classList.add("cg-hidden");
+    } else {
+      el.classList.remove("cg-hidden");
+    }
+  }
+
+  // --- Visibility: broken into focused helpers ---
+
+  function syncRadiosToHiddenInputs(els) {
+    const { modal, accessSelect, accessHidden, loginHidden, requireLoginHidden, signupHidden, proxyCheckbox } = els;
+
+    // Proxy radio → hidden checkbox
+    const proxyYes = modal.querySelector("input[name=\"cg-proxy\"][value=\"yes\"]");
+    if (proxyYes && proxyCheckbox) {
+      proxyCheckbox.checked = proxyYes.checked;
+    }
+
+    // Default access select → hidden input
+    if (accessSelect && accessHidden) {
+      accessHidden.value = accessSelect.value;
+    }
+
+    // Login mode three-way toggle → hidden checkboxes
+    const loginMode = modal.querySelector("input[name=\"cg-login-mode\"]:checked");
+    const loginModeVal = loginMode ? loginMode.value : "disabled";
+    if (loginHidden) loginHidden.checked = (loginModeVal === "enabled" || loginModeVal === "required");
+    if (requireLoginHidden) requireLoginHidden.checked = (loginModeVal === "required");
+
+    const signupYes = modal.querySelector("input[name=\"cg-enable-signup\"][value=\"yes\"]");
+    if (signupYes && signupHidden) signupHidden.checked = signupYes.checked;
+
+    return loginModeVal;
+  }
+
+  function updateFeatureVisibility(els, flags) {
+    const { modal, dbStep, navDb, navEmail, emailOutSection, emailInSection } = els;
+    const { authEnabled, cacheEnabled, webpushEnabled, smtpOutEnabled, smtpInEnabled, needsDb, isPostgres } = flags;
+
+    // Show database question only if a DB-dependent feature is selected
+    setHidden(dbStep, !needsDb);
+
+    // Nav tabs for features
+    for (const featId in NAV_MAP) {
+      const checkbox = modal.querySelector(`#${featId}`);
+      const navTab = modal.querySelector(`#${NAV_MAP[featId]}`);
+      if (checkbox && navTab) {
+        setHidden(navTab, !checkbox.checked);
+      }
+    }
+
+    // Email tab — show if either outgoing or incoming is enabled
+    setHidden(navEmail, !smtpOutEnabled && !smtpInEnabled);
+    setHidden(emailOutSection, !smtpOutEnabled);
+    setHidden(emailInSection, !smtpInEnabled);
+
+    // Show/hide configure buttons next to feature checkboxes
+    modal.querySelectorAll(".cg-btn-configure").forEach((btn) => {
+      const row = btn.closest(".cg-feature-row");
+      if (!row) return;
+      const cb = row.querySelector("input[type=\"checkbox\"]");
+      setHidden(btn, !(cb && cb.checked));
+    });
+
+    // If active nav tab got hidden, switch to General
+    const activeNav = modal.querySelector(".cg-nav-tab.active");
+    if (activeNav && activeNav.classList.contains("cg-hidden")) {
+      switchPanel(modal, "cg-panel-general");
+    }
+
+    // Database tab — show only when PostgreSQL is selected and a DB-dependent feature is on
+    setHidden(navDb, !(needsDb && isPostgres));
+  }
+
+  function updatePostgresFields(modal, isPostgres) {
+    // Show "Using PostgreSQL" instead of file inputs when PostgreSQL is selected
+    ["auth-file", "web-push-file", "cache-file"].forEach((key) => {
+      const input = modal.querySelector(`[data-key="${key}"]`);
+      if (!input) return;
+      const field = input.closest(".cg-field");
+      if (!field) return;
+      input.style.display = isPostgres ? "none" : "";
+      if (isPostgres) {
+        input.dataset.pgDisabled = "1";
+      } else {
+        delete input.dataset.pgDisabled;
+      }
+      let pgLabel = field.querySelector(".cg-pg-label");
+      if (isPostgres) {
+        if (!pgLabel) {
+          pgLabel = document.createElement("span");
+          pgLabel.className = "cg-pg-label";
+          pgLabel.textContent = "Using PostgreSQL";
+          input.parentNode.insertBefore(pgLabel, input.nextSibling);
+        }
+        pgLabel.style.display = "";
+      } else if (pgLabel) {
+        pgLabel.style.display = "none";
+      }
+    });
+
+    // iOS question → upstream-base-url
+    const iosYes = modal.querySelector("input[name=\"cg-ios\"][value=\"yes\"]");
+    const upstreamInput = modal.querySelector("[data-key=\"upstream-base-url\"]");
+    if (iosYes && upstreamInput) {
+      upstreamInput.value = iosYes.checked ? "https://ntfy.sh" : "";
+    }
+  }
+
+  function prefillDefaults(modal, flags) {
+    const {
+      isPostgres,
+      authEnabled,
+      cacheEnabled,
+      attachEnabled,
+      webpushEnabled,
+      smtpOutEnabled,
+      smtpInEnabled
+    } = flags;
+
+    if (isPostgres) {
+      prefill(modal, "database-url", "postgres://user:pass@host:5432/ntfy");
+    }
+
+    if (authEnabled) {
+      if (!isPostgres) prefill(modal, "auth-file", "/var/lib/ntfy/auth.db");
+    }
+
+    if (cacheEnabled) {
+      if (!isPostgres) prefill(modal, "cache-file", "/var/cache/ntfy/cache.db");
+    }
+
+    if (attachEnabled) {
+      prefill(modal, "attachment-cache-dir", "/var/cache/ntfy/attachments");
+    }
+
+    if (webpushEnabled) {
+      if (!isPostgres) prefill(modal, "web-push-file", "/var/lib/ntfy/webpush.db");
+      prefill(modal, "web-push-email-address", "admin@example.com");
+    }
+
+    if (smtpOutEnabled) {
+      prefill(modal, "smtp-sender-addr", "smtp.example.com:587");
+      prefill(modal, "smtp-sender-from", "ntfy@example.com");
+      prefill(modal, "smtp-sender-user", "yoursmtpuser");
+      prefill(modal, "smtp-sender-pass", "yoursmtppass");
+    }
+
+    if (smtpInEnabled) {
+      prefill(modal, "smtp-server-listen", ":25");
+      prefill(modal, "smtp-server-domain", "ntfy.example.com");
+    }
+  }
+
+  function autoDetectServerType(els, loginModeVal) {
+    const { modal, accessSelect } = els;
+    const serverTypeRadio = modal.querySelector("input[name=\"cg-server-type\"]:checked");
+    const serverType = serverTypeRadio ? serverTypeRadio.value : "open";
+
+    if (serverType !== "custom") {
+      const currentAccess = accessSelect ? accessSelect.value : "read-write";
+      const currentLoginEnabled = loginModeVal !== "disabled";
+      const matchesOpen = currentAccess === "read-write" && !currentLoginEnabled;
+      const matchesPrivate = currentAccess === "deny-all" && currentLoginEnabled;
+      if (!matchesOpen && !matchesPrivate) {
+        const customRadio = modal.querySelector("input[name=\"cg-server-type\"][value=\"custom\"]");
+        if (customRadio) customRadio.checked = true;
+      }
+    }
+  }
+
+  function updateVisibility(els) {
+    const {
+      modal,
+      authCheckbox,
+      cacheCheckbox,
+      attachCheckbox,
+      webpushCheckbox,
+      smtpOutCheckbox,
+      smtpInCheckbox
+    } = els;
+
+    const isPostgresRadio = modal.querySelector("input[name=\"cg-db-type\"][value=\"postgres\"]");
+    const isPostgres = isPostgresRadio && isPostgresRadio.checked;
+
+    // Auto-enable auth when PostgreSQL is selected
+    if (isPostgres && authCheckbox && !authCheckbox.checked) {
+      authCheckbox.checked = true;
+    }
+
+    const authEnabled = authCheckbox && authCheckbox.checked;
+    const cacheEnabled = cacheCheckbox && cacheCheckbox.checked;
+    const attachEnabled = attachCheckbox && attachCheckbox.checked;
+    const webpushEnabled = webpushCheckbox && webpushCheckbox.checked;
+    const smtpOutEnabled = smtpOutCheckbox && smtpOutCheckbox.checked;
+    const smtpInEnabled = smtpInCheckbox && smtpInCheckbox.checked;
+    const needsDb = authEnabled || cacheEnabled || webpushEnabled;
+
+    const flags = {
+      isPostgres,
+      authEnabled,
+      cacheEnabled,
+      attachEnabled,
+      webpushEnabled,
+      smtpOutEnabled,
+      smtpInEnabled,
+      needsDb
+    };
+
+    const loginModeVal = syncRadiosToHiddenInputs(els);
+    updateFeatureVisibility(els, flags);
+    updatePostgresFields(modal, isPostgres);
+    prefillDefaults(modal, flags);
+    autoDetectServerType(els, loginModeVal);
+  }
+
+  // --- Repeatable rows ---
+
+  function addRepeatableRow(container, type, onUpdate) {
+    const row = document.createElement("div");
+    row.className = `cg-repeatable-row cg-auth-${type}-row`;
+
+    if (type === "user") {
+      const username = `newuser${secureRandomInt(100) + 1}`;
+      row.innerHTML =
+        `<input type="text" data-field="username" placeholder="Username" value="${escapeHtml(username)}">` +
+        `<input type="text" data-field="password" placeholder="Password" value="${escapeHtml(generatePassword())}">` +
+        "<select data-field=\"role\"><option value=\"user\">User</option><option value=\"admin\">Admin</option></select>" +
+        "<button type=\"button\" class=\"cg-btn-remove\" title=\"Remove\">&times;</button>";
+    } else if (type === "acl") {
+      let aclUser = `someuser${secureRandomInt(100) + 1}`;
+      const modal = container.closest(".cg-modal");
+      if (modal) {
+        const userRows = modal.querySelectorAll(".cg-auth-user-row");
+        for (const ur of userRows) {
+          const role = ur.querySelector("[data-field=\"role\"]");
+          const name = ur.querySelector("[data-field=\"username\"]");
+          if (role && role.value !== "admin" && name && name.value.trim()) {
+            aclUser = name.value.trim();
+            break;
+          }
+        }
+      }
+      row.innerHTML =
+        `<input type="text" data-field="username" placeholder="Username (* for everyone)" value="${escapeHtml(aclUser)}">` +
+        "<input type=\"text\" data-field=\"topic\" placeholder=\"Topic pattern\" value=\"sometopic*\">" +
+        "<select data-field=\"permission\"><option value=\"read-write\">Read &amp; Write</option><option value=\"read-only\">Read Only</option><option value=\"write-only\">Write Only</option><option value=\"deny\">Deny</option></select>" +
+        "<button type=\"button\" class=\"cg-btn-remove\" title=\"Remove\">&times;</button>";
+    } else if (type === "token") {
+      let tokenUser = "";
+      const modal = container.closest(".cg-modal");
+      if (modal) {
+        const firstRow = modal.querySelector(".cg-auth-user-row");
+        const name = firstRow ? firstRow.querySelector("[data-field=\"username\"]") : null;
+        if (name && name.value.trim()) tokenUser = name.value.trim();
+      }
+      row.innerHTML =
+        `<input type="text" data-field="username" placeholder="Username" value="${escapeHtml(tokenUser)}">` +
+        `<input type="text" data-field="token" placeholder="Token" value="${escapeHtml(generateToken())}">` +
+        "<input type=\"text\" data-field=\"label\" placeholder=\"Label (optional)\">" +
+        "<button type=\"button\" class=\"cg-btn-remove\" title=\"Remove\">&times;</button>";
+    }
+
+    row.querySelector(".cg-btn-remove").addEventListener("click", () => {
+      row.remove();
+      onUpdate();
+    });
+    row.querySelectorAll("input, select").forEach((el) => {
+      el.addEventListener("input", onUpdate);
+    });
+
+    container.appendChild(row);
+  }
+
+  // --- Modal functions (module-level) ---
+
+  function openModal(els) {
+    els.modal.style.display = "";
+    document.body.style.overflow = "hidden";
+    updateVisibility(els);
+    updateOutput(els);
+  }
+
+  function closeModal(els) {
+    els.modal.style.display = "none";
+    document.body.style.overflow = "";
+  }
+
+  function resetAll(els) {
+    const { modal } = els;
+
+    // Reset all text/password inputs and clear flags
+    modal.querySelectorAll("input[type=\"text\"], input[type=\"password\"]").forEach((el) => {
+      el.value = "";
+      delete el.dataset.cleared;
+    });
+    // Uncheck all checkboxes
+    modal.querySelectorAll("input[type=\"checkbox\"]").forEach((el) => {
+      el.checked = false;
+      el.disabled = false;
+    });
+    // Reset radio buttons to first option
+    const radioGroups = {};
+    modal.querySelectorAll("input[type=\"radio\"]").forEach((el) => {
+      if (!radioGroups[el.name]) {
+        radioGroups[el.name] = true;
+        const first = modal.querySelector(`input[type="radio"][name="${el.name}"]`);
+        if (first) first.checked = true;
+      } else {
+        el.checked = false;
+      }
+    });
+    // Reset selects to first option
+    modal.querySelectorAll("select").forEach((el) => {
+      el.selectedIndex = 0;
+    });
+    // Remove all repeatable rows
+    modal.querySelectorAll(".cg-auth-user-row, .cg-auth-acl-row, .cg-auth-token-row").forEach((row) => {
+      row.remove();
+    });
+    // Re-prefill base-url
+    const baseUrlInput = modal.querySelector("[data-key=\"base-url\"]");
+    if (baseUrlInput) {
+      baseUrlInput.value = "https://ntfy.example.com";
+    }
+    // Reset to General tab
+    switchPanel(modal, "cg-panel-general");
+    updateVisibility(els);
+    updateOutput(els);
+  }
+
+  function fillVAPIDKeys(els) {
+    const { modal } = els;
+    generateVAPIDKeys().then((keys) => {
+      const pubInput = modal.querySelector("[data-key=\"web-push-public-key\"]");
+      const privInput = modal.querySelector("[data-key=\"web-push-private-key\"]");
+      if (pubInput) pubInput.value = keys.publicKey;
+      if (privInput) privInput.value = keys.privateKey;
+      updateOutput(els);
+    });
+  }
+
+  // --- Event setup (grouped) ---
+
+  function setupModalEvents(els) {
+    const { modal } = els;
+    const openBtn = document.getElementById("cg-open-btn");
+    const closeBtn = document.getElementById("cg-close-btn");
+    const backdrop = modal.querySelector(".cg-modal-backdrop");
+    const resetBtn = document.getElementById("cg-reset-btn");
+
+    if (openBtn) openBtn.addEventListener("click", () => openModal(els));
+    if (closeBtn) closeBtn.addEventListener("click", () => closeModal(els));
+    if (resetBtn) resetBtn.addEventListener("click", () => resetAll(els));
+    if (backdrop) backdrop.addEventListener("click", () => closeModal(els));
+
+    document.addEventListener("keydown", (e) => {
+      if (e.key === "Escape" && modal.style.display !== "none") {
+        closeModal(els);
+      }
+    });
+
+    // Mobile toggle between Edit and Preview panels
+    const toggleBtns = modal.querySelectorAll(".cg-mobile-toggle-btn");
+    const leftPanel = document.getElementById("cg-left");
+    const rightPanel = document.getElementById("cg-right");
+    toggleBtns.forEach((btn) => {
+      btn.addEventListener("click", () => {
+        toggleBtns.forEach((b) => b.classList.remove("active"));
+        btn.classList.add("active");
+        if (btn.dataset.show === "right") {
+          leftPanel.classList.add("cg-mobile-hidden");
+          rightPanel.classList.add("cg-mobile-active");
+        } else {
+          leftPanel.classList.remove("cg-mobile-hidden");
+          rightPanel.classList.remove("cg-mobile-active");
+        }
+      });
+    });
+  }
+
+  function setupAuthEvents(els) {
+    const { modal, authCheckbox, accessSelect } = els;
+    if (!authCheckbox) return;
+
+    // Auth checkbox: clean up when unchecked
+    authCheckbox.addEventListener("change", () => {
+      if (!authCheckbox.checked) {
+        // Clear auth-file
+        const authFile = modal.querySelector("[data-key=\"auth-file\"]");
+        if (authFile) {
+          authFile.value = "";
+          delete authFile.dataset.cleared;
+        }
+        // Reset default access
+        if (accessSelect) accessSelect.value = "read-write";
+        // Reset login mode to Disabled and unset hidden checkboxes
+        const loginDisabled = modal.querySelector("input[name=\"cg-login-mode\"][value=\"disabled\"]");
+        if (loginDisabled) loginDisabled.checked = true;
+        if (els.loginHidden) els.loginHidden.checked = false;
+        if (els.requireLoginHidden) els.requireLoginHidden.checked = false;
+        const signupNo = modal.querySelector("input[name=\"cg-enable-signup\"][value=\"no\"]");
+        if (signupNo) signupNo.checked = true;
+        if (els.signupHidden) els.signupHidden.checked = false;
+        // Reset UnifiedPush to No
+        const upNo = modal.querySelector("input[name=\"cg-unifiedpush\"][value=\"no\"]");
+        if (upNo) upNo.checked = true;
+        // Remove provisioned users/ACLs/tokens
+        modal.querySelectorAll(".cg-auth-user-row, .cg-auth-acl-row, .cg-auth-token-row").forEach((row) => {
+          row.remove();
+        });
+        // Switch server type to Open
+        const openRadio = modal.querySelector("input[name=\"cg-server-type\"][value=\"open\"]");
+        if (openRadio) openRadio.checked = true;
+      }
+    });
+  }
+
+  function setupServerTypeEvents(els) {
+    const { modal, authCheckbox, accessSelect } = els;
+
+    modal.querySelectorAll("input[name=\"cg-server-type\"]").forEach((radio) => {
+      radio.addEventListener("change", () => {
+        const loginDisabledRadio = modal.querySelector("input[name=\"cg-login-mode\"][value=\"disabled\"]");
+        const loginRequiredRadio = modal.querySelector("input[name=\"cg-login-mode\"][value=\"required\"]");
+        if (radio.value === "open") {
+          if (accessSelect) accessSelect.value = "read-write";
+          if (loginDisabledRadio) loginDisabledRadio.checked = true;
+          if (authCheckbox) authCheckbox.checked = false;
+          // Trigger the auth cleanup
+          authCheckbox.dispatchEvent(new Event("change"));
+        } else if (radio.value === "private") {
+          // Enable auth with required login
+          if (authCheckbox) authCheckbox.checked = true;
+          if (accessSelect) accessSelect.value = "deny-all";
+          if (loginRequiredRadio) loginRequiredRadio.checked = true;
+          if (els.loginHidden) els.loginHidden.checked = true;
+          if (els.requireLoginHidden) els.requireLoginHidden.checked = true;
+          // Add default admin user if no users exist
+          const usersContainer = modal.querySelector("#cg-auth-users-container");
+          if (usersContainer && !usersContainer.querySelector(".cg-auth-user-row")) {
+            const onUpdate = () => {
+              updateVisibility(els);
+              updateOutput(els);
+            };
+            addRepeatableRow(usersContainer, "user", onUpdate);
+            const adminRow = usersContainer.querySelector(".cg-auth-user-row:last-child");
+            if (adminRow) {
+              const u = adminRow.querySelector("[data-field=\"username\"]");
+              const p = adminRow.querySelector("[data-field=\"password\"]");
+              const r = adminRow.querySelector("[data-field=\"role\"]");
+              if (u) u.value = "ntfyadmin";
+              if (p) p.value = generatePassword();
+              if (r) r.value = "admin";
+            }
+            addRepeatableRow(usersContainer, "user", onUpdate);
+            const userRow = usersContainer.querySelector(".cg-auth-user-row:last-child");
+            if (userRow) {
+              const u = userRow.querySelector("[data-field=\"username\"]");
+              const p = userRow.querySelector("[data-field=\"password\"]");
+              if (u) u.value = "ntfyuser";
+              if (p) p.value = generatePassword();
+            }
+          }
+        }
+        // "custom" doesn't change anything
+      });
+    });
+  }
+
+  function setupUnifiedPushEvents(els) {
+    const { modal } = els;
+    const onUpdate = () => {
+      updateVisibility(els);
+      updateOutput(els);
+    };
+
+    modal.querySelectorAll("input[name=\"cg-unifiedpush\"]").forEach((radio) => {
+      radio.addEventListener("change", () => {
+        const aclsContainer = modal.querySelector("#cg-auth-acls-container");
+        if (!aclsContainer) return;
+        const existing = aclsContainer.querySelector(".cg-auth-acl-row-up");
+        if (radio.value === "yes" && radio.checked && !existing) {
+          // Enable auth if not already enabled
+          if (els.authCheckbox && !els.authCheckbox.checked) {
+            els.authCheckbox.checked = true;
+          }
+          // Add a disabled UnifiedPush ACL row
+          const row = document.createElement("div");
+          row.className = "cg-repeatable-row cg-auth-acl-row cg-auth-acl-row-up";
+          row.innerHTML =
+            "<input type=\"text\" data-field=\"username\" value=\"*\" disabled>" +
+            "<input type=\"text\" data-field=\"topic\" value=\"up*\" disabled>" +
+            "<select data-field=\"permission\" disabled><option value=\"write-only\">Write Only</option></select>" +
+            "<button type=\"button\" class=\"cg-btn-remove\" title=\"Removing this ACL entry will disable UnifiedPush support\">&times;</button>";
+          row.querySelector(".cg-btn-remove").addEventListener("click", () => {
+            row.remove();
+            const upNo = modal.querySelector("input[name=\"cg-unifiedpush\"][value=\"no\"]");
+            if (upNo) upNo.checked = true;
+            onUpdate();
+          });
+          // Insert at the beginning
+          aclsContainer.insertBefore(row, aclsContainer.firstChild);
+          onUpdate();
+        } else if (radio.value === "no" && radio.checked && existing) {
+          existing.remove();
+          onUpdate();
+        }
+      });
+    });
+  }
+
+  function setupFormListeners(els) {
+    const { modal } = els;
+    const onUpdate = () => {
+      updateVisibility(els);
+      updateOutput(els);
+    };
+
+    // Left nav tab switching
+    modal.querySelectorAll(".cg-nav-tab").forEach((tab) => {
+      tab.addEventListener("click", () => {
+        const panelId = tab.getAttribute("data-panel");
+        switchPanel(modal, panelId);
+      });
+    });
+
+    // Configure buttons in feature grid
+    modal.querySelectorAll(".cg-btn-configure").forEach((btn) => {
+      btn.addEventListener("click", () => {
+        const panelId = btn.getAttribute("data-panel");
+        if (panelId) switchPanel(modal, panelId);
+      });
+    });
+
+    // Output format tab switching
+    modal.querySelectorAll(".cg-output-tab").forEach((tab) => {
+      tab.addEventListener("click", () => {
+        modal.querySelectorAll(".cg-output-tab").forEach((t) => t.classList.remove("active"));
+        tab.classList.add("active");
+        updateOutput(els);
+      });
+    });
+
+    // All form inputs trigger update
+    modal.querySelectorAll("input, select").forEach((el) => {
+      const evt = (el.type === "checkbox" || el.type === "radio") ? "change" : "input";
+      el.addEventListener(evt, () => {
+        // Mark text fields as cleared when user empties them
+        if ((el.type === "text" || el.type === "password") && el.dataset.key && !el.value.trim()) {
+          el.dataset.cleared = "1";
+        } else if ((el.type === "text" || el.type === "password") && el.dataset.key && el.value.trim()) {
+          delete el.dataset.cleared;
+        }
+        onUpdate();
+      });
+    });
+
+    // Add buttons for repeatable rows
+    modal.querySelectorAll(".cg-btn-add[data-add-type]").forEach((btn) => {
+      btn.addEventListener("click", () => {
+        const type = btn.getAttribute("data-add-type");
+        let container = btn.previousElementSibling;
+        if (!container) container = btn.parentElement.querySelector(".cg-repeatable-container");
+        addRepeatableRow(container, type, onUpdate);
+        onUpdate();
+      });
+    });
+
+    // Copy button
+    const copyBtn = modal.querySelector("#cg-copy-btn");
+    if (copyBtn) {
+      const copyIcon = "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><rect x=\"9\" y=\"9\" width=\"13\" height=\"13\" rx=\"2\" ry=\"2\"></rect><path d=\"M5 15H4a2 2 0 0 1-2-2V4a2 2 0 0 1 2-2h9a2 2 0 0 1 2 2v1\"></path></svg>";
+      const checkIcon = "<svg xmlns=\"http://www.w3.org/2000/svg\" width=\"14\" height=\"14\" viewBox=\"0 0 24 24\" fill=\"none\" stroke=\"currentColor\" stroke-width=\"2\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><polyline points=\"20 6 9 17 4 12\"></polyline></svg>";
+      copyBtn.addEventListener("click", () => {
+        const code = modal.querySelector("#cg-code");
+        if (code && code.textContent) {
+          navigator.clipboard.writeText(code.textContent).then(() => {
+            copyBtn.innerHTML = checkIcon;
+            copyBtn.style.color = "var(--md-primary-fg-color)";
+            setTimeout(() => {
+              copyBtn.innerHTML = copyIcon;
+              copyBtn.style.color = "";
+            }, 2000);
+          });
+        }
+      });
+    }
+  }
+
+  function setupWebPushEvents(els) {
+    const { modal } = els;
+    let vapidKeysGenerated = false;
+    const regenBtn = modal.querySelector("#cg-regen-keys");
+
+    if (regenBtn) {
+      regenBtn.addEventListener("click", () => fillVAPIDKeys(els));
+    }
+
+    // Auto-generate keys when web push is first enabled
+    const webpushFeat = modal.querySelector("#cg-feat-webpush");
+    if (webpushFeat) {
+      webpushFeat.addEventListener("change", () => {
+        if (webpushFeat.checked && !vapidKeysGenerated) {
+          vapidKeysGenerated = true;
+          fillVAPIDKeys(els);
+        }
+      });
+    }
+  }
+
+  // --- Init ---
+
+  function initGenerator() {
+    const modal = document.getElementById("cg-modal");
+    if (!modal) return;
+
+    const els = cacheElements(modal);
+
+    setupModalEvents(els);
+    setupAuthEvents(els);
+    setupServerTypeEvents(els);
+    setupUnifiedPushEvents(els);
+    setupFormListeners(els);
+    setupWebPushEvents(els);
+
+    // Pre-fill base-url
+    const baseUrlInput = modal.querySelector("[data-key=\"base-url\"]");
+    if (baseUrlInput && !baseUrlInput.value.trim()) {
+      baseUrlInput.value = "https://ntfy.example.com";
+    }
+
+    // Auto-open if URL hash points to config generator
+    if (window.location.hash === "#config-generator") {
+      openModal(els);
+    }
+  }
+
+  if (document.readyState === "loading") {
+    document.addEventListener("DOMContentLoaded", initGenerator);
+  } else {
+    initGenerator();
+  }
+})();
diff --git a/go.mod b/go.mod
index 6dd9384f..c073d6aa 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.25.0
 
 require (
 	cloud.google.com/go/firestore v1.21.0 // indirect
-	cloud.google.com/go/storage v1.60.0 // indirect
+	cloud.google.com/go/storage v1.61.1 // indirect
 	github.com/BurntSushi/toml v1.6.0 // indirect
 	github.com/cpuguy83/go-md2man/v2 v2.0.7 // indirect
 	github.com/emersion/go-smtp v0.18.0
@@ -14,12 +14,12 @@ require (
 	github.com/olebedev/when v1.1.0
 	github.com/stretchr/testify v1.11.1
 	github.com/urfave/cli/v2 v2.27.7
-	golang.org/x/crypto v0.48.0
-	golang.org/x/oauth2 v0.35.0 // indirect
-	golang.org/x/sync v0.19.0
-	golang.org/x/term v0.40.0
-	golang.org/x/time v0.14.0
-	google.golang.org/api v0.269.0
+	golang.org/x/crypto v0.49.0
+	golang.org/x/oauth2 v0.36.0 // indirect
+	golang.org/x/sync v0.20.0
+	golang.org/x/term v0.41.0
+	golang.org/x/time v0.15.0
+	google.golang.org/api v0.271.0
 	gopkg.in/yaml.v2 v2.4.0
 )
 
@@ -34,14 +34,14 @@ require (
 	github.com/microcosm-cc/bluemonday v1.0.27
 	github.com/prometheus/client_golang v1.23.2
 	github.com/stripe/stripe-go/v74 v74.30.0
-	golang.org/x/sys v0.41.0
-	golang.org/x/text v0.34.0
+	golang.org/x/sys v0.42.0
+	golang.org/x/text v0.35.0
 )
 
 require (
 	cel.dev/expr v0.25.1 // indirect
 	cloud.google.com/go v0.123.0 // indirect
-	cloud.google.com/go/auth v0.18.2 // indirect
+	cloud.google.com/go/auth v0.18.3-0.20260310051336-87cdcc9f7568 // indirect
 	cloud.google.com/go/auth/oauth2adapt v0.2.8 // indirect
 	cloud.google.com/go/compute/metadata v0.9.0 // indirect
 	cloud.google.com/go/iam v1.5.3 // indirect
@@ -70,7 +70,7 @@ require (
 	github.com/google/s2a-go v0.1.9 // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/googleapis/enterprise-certificate-proxy v0.3.14 // indirect
-	github.com/googleapis/gax-go/v2 v2.17.0 // indirect
+	github.com/googleapis/gax-go/v2 v2.18.0 // indirect
 	github.com/gorilla/css v1.0.1 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
@@ -86,20 +86,20 @@ require (
 	github.com/stretchr/objx v0.5.2 // indirect
 	github.com/xrash/smetrics v0.0.0-20250705151800-55b8f293f342 // indirect
 	go.opentelemetry.io/auto/sdk v1.2.1 // indirect
-	go.opentelemetry.io/contrib/detectors/gcp v1.41.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.66.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.66.0 // indirect
-	go.opentelemetry.io/otel v1.41.0 // indirect
-	go.opentelemetry.io/otel/metric v1.41.0 // indirect
-	go.opentelemetry.io/otel/sdk v1.41.0 // indirect
-	go.opentelemetry.io/otel/sdk/metric v1.41.0 // indirect
-	go.opentelemetry.io/otel/trace v1.41.0 // indirect
-	go.yaml.in/yaml/v2 v2.4.3 // indirect
-	golang.org/x/net v0.51.0 // indirect
+	go.opentelemetry.io/contrib/detectors/gcp v1.42.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.67.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.67.0 // indirect
+	go.opentelemetry.io/otel v1.42.0 // indirect
+	go.opentelemetry.io/otel/metric v1.42.0 // indirect
+	go.opentelemetry.io/otel/sdk v1.42.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.42.0 // indirect
+	go.opentelemetry.io/otel/trace v1.42.0 // indirect
+	go.yaml.in/yaml/v2 v2.4.4 // indirect
+	golang.org/x/net v0.52.0 // indirect
 	google.golang.org/appengine/v2 v2.0.6 // indirect
-	google.golang.org/genproto v0.0.0-20260226221140-a57be14db171 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20260226221140-a57be14db171 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20260226221140-a57be14db171 // indirect
+	google.golang.org/genproto v0.0.0-20260311181403-84a4fc48630c // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20260311181403-84a4fc48630c // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20260311181403-84a4fc48630c // indirect
 	google.golang.org/grpc v1.79.2 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
diff --git a/go.sum b/go.sum
index c39fc3a1..1c6eada9 100644
--- a/go.sum
+++ b/go.sum
@@ -2,8 +2,8 @@ cel.dev/expr v0.25.1 h1:1KrZg61W6TWSxuNZ37Xy49ps13NUovb66QLprthtwi4=
 cel.dev/expr v0.25.1/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4=
 cloud.google.com/go v0.123.0 h1:2NAUJwPR47q+E35uaJeYoNhuNEM9kM8SjgRgdeOJUSE=
 cloud.google.com/go v0.123.0/go.mod h1:xBoMV08QcqUGuPW65Qfm1o9Y4zKZBpGS+7bImXLTAZU=
-cloud.google.com/go/auth v0.18.2 h1:+Nbt5Ev0xEqxlNjd6c+yYUeosQ5TtEUaNcN/3FozlaM=
-cloud.google.com/go/auth v0.18.2/go.mod h1:xD+oY7gcahcu7G2SG2DsBerfFxgPAJz17zz2joOFF3M=
+cloud.google.com/go/auth v0.18.3-0.20260310051336-87cdcc9f7568 h1:PJt3KrySfZkKdcEV2wlyNkfAPbMZGjtnv5oLrT4tWPg=
+cloud.google.com/go/auth v0.18.3-0.20260310051336-87cdcc9f7568/go.mod h1:/Tt0rLCp4FHXEBtdyYqvIZPcJzbpJ/fmqtgIaXseDK4=
 cloud.google.com/go/auth/oauth2adapt v0.2.8 h1:keo8NaayQZ6wimpNSmW5OPc283g65QNIiLpZnkHRbnc=
 cloud.google.com/go/auth/oauth2adapt v0.2.8/go.mod h1:XQ9y31RkqZCcwJWNSx2Xvric3RrU88hAYYbjDWYDL+c=
 cloud.google.com/go/compute/metadata v0.9.0 h1:pDUj4QMoPejqq20dK0Pg2N4yG9zIkYGdBtwLoEkH9Zs=
@@ -18,8 +18,8 @@ cloud.google.com/go/longrunning v0.8.0 h1:LiKK77J3bx5gDLi4SMViHixjD2ohlkwBi+mKA7
 cloud.google.com/go/longrunning v0.8.0/go.mod h1:UmErU2Onzi+fKDg2gR7dusz11Pe26aknR4kHmJJqIfk=
 cloud.google.com/go/monitoring v1.24.3 h1:dde+gMNc0UhPZD1Azu6at2e79bfdztVDS5lvhOdsgaE=
 cloud.google.com/go/monitoring v1.24.3/go.mod h1:nYP6W0tm3N9H/bOw8am7t62YTzZY+zUeQ+Bi6+2eonI=
-cloud.google.com/go/storage v1.60.0 h1:oBfZrSOCimggVNz9Y/bXY35uUcts7OViubeddTTVzQ8=
-cloud.google.com/go/storage v1.60.0/go.mod h1:q+5196hXfejkctrnx+VYU8RKQr/L3c0cBIlrjmiAKE0=
+cloud.google.com/go/storage v1.61.1 h1:VELCSvZKiSw0AS1k3so5mKGy3CB7bTCYD8EHhTF42bY=
+cloud.google.com/go/storage v1.61.1/go.mod h1:k30/hwYfd0M8aULYbPkQLgNf+SFcdjlRHvLMXggw18E=
 cloud.google.com/go/trace v1.11.7 h1:kDNDX8JkaAG3R2nq1lIdkb7FCSi1rCmsEtKVsty7p+U=
 cloud.google.com/go/trace v1.11.7/go.mod h1:TNn9d5V3fQVf6s4SCveVMIBS2LJUqo73GACmq/Tky0s=
 firebase.google.com/go/v4 v4.19.0 h1:f5NMlC2YHFsncz00c2+ecBr+ZYlRMhKIhj1z8Iz0lD8=
@@ -98,8 +98,8 @@ github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/googleapis/enterprise-certificate-proxy v0.3.14 h1:yh8ncqsbUY4shRD5dA6RlzjJaT4hi3kII+zYw8wmLb8=
 github.com/googleapis/enterprise-certificate-proxy v0.3.14/go.mod h1:vqVt9yG9480NtzREnTlmGSBmFrA+bzb0yl0TxoBQXOg=
-github.com/googleapis/gax-go/v2 v2.17.0 h1:RksgfBpxqff0EZkDWYuz9q/uWsTVz+kf43LsZ1J6SMc=
-github.com/googleapis/gax-go/v2 v2.17.0/go.mod h1:mzaqghpQp4JDh3HvADwrat+6M3MOIDp5YKHhb9PAgDY=
+github.com/googleapis/gax-go/v2 v2.18.0 h1:jxP5Uuo3bxm3M6gGtV94P4lliVetoCB4Wk2x8QA86LI=
+github.com/googleapis/gax-go/v2 v2.18.0/go.mod h1:uSzZN4a356eRG985CzJ3WfbFSpqkLTjsnhWGJR6EwrE=
 github.com/gorilla/css v1.0.1 h1:ntNaBIghp6JmvWnxbZKANoLyuXTPZ4cAMlo6RyhlbO8=
 github.com/gorilla/css v1.0.1/go.mod h1:BvnYkspnSzMmwRK+b8/xgNPLiIuNZr6vbZBTPQ2A3b0=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
@@ -165,36 +165,36 @@ github.com/xrash/smetrics v0.0.0-20250705151800-55b8f293f342/go.mod h1:Ohn+xnUBi
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 go.opentelemetry.io/auto/sdk v1.2.1 h1:jXsnJ4Lmnqd11kwkBV2LgLoFMZKizbCi5fNZ/ipaZ64=
 go.opentelemetry.io/auto/sdk v1.2.1/go.mod h1:KRTj+aOaElaLi+wW1kO/DZRXwkF4C5xPbEe3ZiIhN7Y=
-go.opentelemetry.io/contrib/detectors/gcp v1.41.0 h1:MBzEwqhroF0JK0DpTVYWDxsenxm6L4PqOEfA90uZ5AA=
-go.opentelemetry.io/contrib/detectors/gcp v1.41.0/go.mod h1:5pSDD0v0t2HqUmPC5cBBc+nLQO4dLYWnzBNheXLBLgs=
-go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.66.0 h1:w/o339tDd6Qtu3+ytwt+/jon2yjAs3Ot8Xq8pelfhSo=
-go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.66.0/go.mod h1:pdhNtM9C4H5fRdrnwO7NjxzQWhKSSxCHk/KluVqDVC0=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.66.0 h1:PnV4kVnw0zOmwwFkAzCN5O07fw1YOIQor120zrh0AVo=
-go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.66.0/go.mod h1:ofAwF4uinaf8SXdVzzbL4OsxJ3VfeEg3f/F6CeF49/Y=
-go.opentelemetry.io/otel v1.41.0 h1:YlEwVsGAlCvczDILpUXpIpPSL/VPugt7zHThEMLce1c=
-go.opentelemetry.io/otel v1.41.0/go.mod h1:Yt4UwgEKeT05QbLwbyHXEwhnjxNO6D8L5PQP51/46dE=
-go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.39.0 h1:5gn2urDL/FBnK8OkCfD1j3/ER79rUuTYmCvlXBKeYL8=
-go.opentelemetry.io/otel/exporters/stdout/stdoutmetric v1.39.0/go.mod h1:0fBG6ZJxhqByfFZDwSwpZGzJU671HkwpWaNe2t4VUPI=
-go.opentelemetry.io/otel/metric v1.41.0 h1:rFnDcs4gRzBcsO9tS8LCpgR0dxg4aaxWlJxCno7JlTQ=
-go.opentelemetry.io/otel/metric v1.41.0/go.mod h1:xPvCwd9pU0VN8tPZYzDZV/BMj9CM9vs00GuBjeKhJps=
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-go.opentelemetry.io/otel/sdk/metric v1.41.0/go.mod h1:HNBuSvT7ROaGtGI50ArdRLUnvRTRGniSUZbxiWxSO8Y=
-go.opentelemetry.io/otel/trace v1.41.0 h1:Vbk2co6bhj8L59ZJ6/xFTskY+tGAbOnCtQGVVa9TIN0=
-go.opentelemetry.io/otel/trace v1.41.0/go.mod h1:U1NU4ULCoxeDKc09yCWdWe+3QoyweJcISEVa1RBzOis=
+go.opentelemetry.io/contrib/detectors/gcp v1.42.0 h1:kpt2PEJuOuqYkPcktfJqWWDjTEd/FNgrxcniL7kQrXQ=
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 go.uber.org/goleak v1.3.0/go.mod h1:CoHD4mav9JJNrW/WLlf7HGZPjdw8EucARQHekz1X6bE=
-go.yaml.in/yaml/v2 v2.4.3 h1:6gvOSjQoTB3vt1l+CU+tSyi/HOjfOjRLJ4YwYZGwRO0=
-go.yaml.in/yaml/v2 v2.4.3/go.mod h1:zSxWcmIDjOzPXpjlTTbAsKokqkDNAVtZO0WOMiT90s8=
+go.yaml.in/yaml/v2 v2.4.4 h1:tuyd0P+2Ont/d6e2rl3be67goVK4R6deVxCUX5vyPaQ=
+go.yaml.in/yaml/v2 v2.4.4/go.mod h1:gMZqIpDtDqOfM0uNfy0SkpRhvUryYH0Z6wdMYcacYXQ=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
 golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
 golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
 golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
 golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
-golang.org/x/crypto v0.48.0 h1:/VRzVqiRSggnhY7gNRxPauEQ5Drw9haKdM0jqfcCFts=
-golang.org/x/crypto v0.48.0/go.mod h1:r0kV5h3qnFPlQnBSrULhlsRfryS2pmewsg+XfMgkVos=
+golang.org/x/crypto v0.49.0 h1:+Ng2ULVvLHnJ/ZFEq4KdcDd/cfjrrjjNSXNzxg0Y4U4=
+golang.org/x/crypto v0.49.0/go.mod h1:ErX4dUh2UM+CFYiXZRTcMpEcN8b/1gxEuv3nODoYtCA=
 golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
 golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
 golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
@@ -209,10 +209,10 @@ golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
 golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
 golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
 golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
-golang.org/x/net v0.51.0 h1:94R/GTO7mt3/4wIKpcR5gkGmRLOuE/2hNGeWq/GBIFo=
-golang.org/x/net v0.51.0/go.mod h1:aamm+2QF5ogm02fjy5Bb7CQ0WMt1/WVM7FtyaTLlA9Y=
-golang.org/x/oauth2 v0.35.0 h1:Mv2mzuHuZuY2+bkyWXIHMfhNdJAdwW3FuWeCPYN5GVQ=
-golang.org/x/oauth2 v0.35.0/go.mod h1:lzm5WQJQwKZ3nwavOZ3IS5Aulzxi68dUSgRHujetwEA=
+golang.org/x/net v0.52.0 h1:He/TN1l0e4mmR3QqHMT2Xab3Aj3L9qjbhRm78/6jrW0=
+golang.org/x/net v0.52.0/go.mod h1:R1MAz7uMZxVMualyPXb+VaqGSa3LIaUqk0eEt3w36Sw=
+golang.org/x/oauth2 v0.36.0 h1:peZ/1z27fi9hUOFCAZaHyrpWG5lwe0RJEEEeH0ThlIs=
+golang.org/x/oauth2 v0.36.0/go.mod h1:YDBUJMTkDnJS+A4BP4eZBjCqtokkg1hODuPjwiGPO7Q=
 golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
 golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
@@ -220,8 +220,8 @@ golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
 golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
-golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
-golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
@@ -234,8 +234,8 @@ golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
-golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.42.0 h1:omrd2nAlyT5ESRdCLYdm3+fMfNFE/+Rf4bDIQImRJeo=
+golang.org/x/sys v0.42.0/go.mod h1:4GL1E5IUh+htKOUEOaiffhrAeqysfVGipDYzABqnCmw=
 golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -245,8 +245,8 @@ golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
 golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/term v0.27.0/go.mod h1:iMsnZpn0cago0GOrHO2+Y7u7JPn5AylBrcoWkElMTSM=
-golang.org/x/term v0.40.0 h1:36e4zGLqU4yhjlmxEaagx2KuYbJq3EwY8K943ZsHcvg=
-golang.org/x/term v0.40.0/go.mod h1:w2P8uVp06p2iyKKuvXIm7N/y0UCRt3UfJTfZ7oOpglM=
+golang.org/x/term v0.41.0 h1:QCgPso/Q3RTJx2Th4bDLqML4W6iJiaXFq2/ftQF13YU=
+golang.org/x/term v0.41.0/go.mod h1:3pfBgksrReYfZ5lvYM0kSO0LIkAl4Yl2bXOkKP7Ec2A=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
@@ -258,10 +258,10 @@ golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
-golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
-golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
-golang.org/x/time v0.14.0 h1:MRx4UaLrDotUKUdCIqzPC48t1Y9hANFKIRpNx+Te8PI=
-golang.org/x/time v0.14.0/go.mod h1:eL/Oa2bBBK0TkX57Fyni+NgnyQQN4LitPmob2Hjnqw4=
+golang.org/x/text v0.35.0 h1:JOVx6vVDFokkpaq1AEptVzLTpDe9KGpj5tR4/X+ybL8=
+golang.org/x/text v0.35.0/go.mod h1:khi/HExzZJ2pGnjenulevKNX1W67CUy0AsXcNubPGCA=
+golang.org/x/time v0.15.0 h1:bbrp8t3bGUeFOx08pvsMYRTCVSMk89u4tKbNOZbp88U=
+golang.org/x/time v0.15.0/go.mod h1:Y4YMaQmXwGQZoFaVFk4YpCt4FLQMYKZe9oeV/f4MSno=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
@@ -272,16 +272,16 @@ golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8T
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
 gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
-google.golang.org/api v0.269.0 h1:qDrTOxKUQ/P0MveH6a7vZ+DNHxJQjtGm/uvdbdGXCQg=
-google.golang.org/api v0.269.0/go.mod h1:N8Wpcu23Tlccl0zSHEkcAZQKDLdquxK+l9r2LkwAauE=
+google.golang.org/api v0.271.0 h1:cIPN4qcUc61jlh7oXu6pwOQqbJW2GqYh5PS6rB2C/JY=
+google.golang.org/api v0.271.0/go.mod h1:CGT29bhwkbF+i11qkRUJb2KMKqcJ1hdFceEIRd9u64Q=
 google.golang.org/appengine/v2 v2.0.6 h1:LvPZLGuchSBslPBp+LAhihBeGSiRh1myRoYK4NtuBIw=
 google.golang.org/appengine/v2 v2.0.6/go.mod h1:WoEXGoXNfa0mLvaH5sV3ZSGXwVmy8yf7Z1JKf3J3wLI=
-google.golang.org/genproto v0.0.0-20260226221140-a57be14db171 h1:RxhCsti413yL0IjU9dVvuTbCISo8gs3RW1jPMStck+4=
-google.golang.org/genproto v0.0.0-20260226221140-a57be14db171/go.mod h1:uhvzakVEqAuXU3TC2JCsxIRe5f77l+JySE3EqPoMyqM=
-google.golang.org/genproto/googleapis/api v0.0.0-20260226221140-a57be14db171 h1:tu/dtnW1o3wfaxCOjSLn5IRX4YDcJrtlpzYkhHhGaC4=
-google.golang.org/genproto/googleapis/api v0.0.0-20260226221140-a57be14db171/go.mod h1:M5krXqk4GhBKvB596udGL3UyjL4I1+cTbK0orROM9ng=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260226221140-a57be14db171 h1:ggcbiqK8WWh6l1dnltU4BgWGIGo+EVYxCaAPih/zQXQ=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20260226221140-a57be14db171/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
+google.golang.org/genproto v0.0.0-20260311181403-84a4fc48630c h1:ZhFDeBMmFc/4g8/GwxnJ4rzB3O4GwQVNr+8Mh7Y5z4g=
+google.golang.org/genproto v0.0.0-20260311181403-84a4fc48630c/go.mod h1:hf4r/rBuzaTkLUWRO03771Xvcs6P5hwdQK3UUEJjqo0=
+google.golang.org/genproto/googleapis/api v0.0.0-20260311181403-84a4fc48630c h1:OyQPd6I3pN/9gDxz6L13kYGJgqkpdrAohJRBeXyxlgI=
+google.golang.org/genproto/googleapis/api v0.0.0-20260311181403-84a4fc48630c/go.mod h1:X2gu9Qwng7Nn009s/r3RUxqkzQNqOrAy79bluY7ojIg=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260311181403-84a4fc48630c h1:xgCzyF2LFIO/0X2UAoVRiXKU5Xg6VjToG4i2/ecSswk=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20260311181403-84a4fc48630c/go.mod h1:4Hqkh8ycfw05ld/3BWL7rJOSfebL2Q+DVDeRgYgxUU8=
 google.golang.org/grpc v1.79.2 h1:fRMD94s2tITpyJGtBBn7MkMseNpOZU8ZxgC3MMBaXRU=
 google.golang.org/grpc v1.79.2/go.mod h1:KmT0Kjez+0dde/v2j9vzwoAScgEPx/Bw1CYChhHLrHQ=
 google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
diff --git a/message/cache.go b/message/cache.go
index 3b12af3e..76aba4be 100644
--- a/message/cache.go
+++ b/message/cache.go
@@ -50,14 +50,14 @@ type queries struct {
 
 // Cache stores published messages
 type Cache struct {
-	db      *sql.DB
+	db      *db.DB
 	queue   *util.BatchingQueue[*model.Message]
 	nop     bool
 	mu      *sync.Mutex // nil for PostgreSQL (concurrent writes supported), set for SQLite (single writer)
 	queries queries
 }
 
-func newCache(db *sql.DB, queries queries, mu *sync.Mutex, batchSize int, batchTimeout time.Duration, nop bool) *Cache {
+func newCache(db *db.DB, queries queries, mu *sync.Mutex, batchSize int, batchTimeout time.Duration, nop bool) *Cache {
 	var queue *util.BatchingQueue[*model.Message]
 	if batchSize > 0 || batchTimeout > 0 {
 		queue = util.NewBatchingQueue[*model.Message](batchSize, batchTimeout)
@@ -125,16 +125,16 @@ func (c *Cache) addMessages(ms []*model.Message) error {
 			return model.ErrUnexpectedMessageType
 		}
 		published := m.Time <= time.Now().Unix()
-		tags := strings.Join(m.Tags, ",")
+		tags := util.SanitizeUTF8(strings.Join(m.Tags, ","))
 		var attachmentName, attachmentType, attachmentURL string
 		var attachmentSize, attachmentExpires int64
 		var attachmentDeleted bool
 		if m.Attachment != nil {
-			attachmentName = m.Attachment.Name
-			attachmentType = m.Attachment.Type
+			attachmentName = util.SanitizeUTF8(m.Attachment.Name)
+			attachmentType = util.SanitizeUTF8(m.Attachment.Type)
 			attachmentSize = m.Attachment.Size
 			attachmentExpires = m.Attachment.Expires
-			attachmentURL = m.Attachment.URL
+			attachmentURL = util.SanitizeUTF8(m.Attachment.URL)
 		}
 		var actionsStr string
 		if len(m.Actions) > 0 {
@@ -154,13 +154,13 @@ func (c *Cache) addMessages(ms []*model.Message) error {
 			m.Time,
 			m.Event,
 			m.Expires,
-			m.Topic,
-			m.Message,
-			m.Title,
+			util.SanitizeUTF8(m.Topic),
+			util.SanitizeUTF8(m.Message),
+			util.SanitizeUTF8(m.Title),
 			m.Priority,
 			tags,
-			m.Click,
-			m.Icon,
+			util.SanitizeUTF8(m.Click),
+			util.SanitizeUTF8(m.Icon),
 			actionsStr,
 			attachmentName,
 			attachmentType,
@@ -170,7 +170,7 @@ func (c *Cache) addMessages(ms []*model.Message) error {
 			attachmentDeleted, // Always zero
 			sender,
 			m.User,
-			m.ContentType,
+			util.SanitizeUTF8(m.ContentType),
 			m.Encoding,
 			published,
 		)
@@ -201,10 +201,11 @@ func (c *Cache) Messages(topic string, since model.SinceMarker, scheduled bool)
 func (c *Cache) messagesSinceTime(topic string, since model.SinceMarker, scheduled bool) ([]*model.Message, error) {
 	var rows *sql.Rows
 	var err error
+	rdb := c.db.ReadOnly()
 	if scheduled {
-		rows, err = c.db.Query(c.queries.selectMessagesSinceTimeScheduled, topic, since.Time().Unix())
+		rows, err = rdb.Query(c.queries.selectMessagesSinceTimeScheduled, topic, since.Time().Unix())
 	} else {
-		rows, err = c.db.Query(c.queries.selectMessagesSinceTime, topic, since.Time().Unix())
+		rows, err = rdb.Query(c.queries.selectMessagesSinceTime, topic, since.Time().Unix())
 	}
 	if err != nil {
 		return nil, err
@@ -215,10 +216,11 @@ func (c *Cache) messagesSinceTime(topic string, since model.SinceMarker, schedul
 func (c *Cache) messagesSinceID(topic string, since model.SinceMarker, scheduled bool) ([]*model.Message, error) {
 	var rows *sql.Rows
 	var err error
+	rdb := c.db.ReadOnly()
 	if scheduled {
-		rows, err = c.db.Query(c.queries.selectMessagesSinceIDScheduled, topic, since.ID())
+		rows, err = rdb.Query(c.queries.selectMessagesSinceIDScheduled, topic, since.ID())
 	} else {
-		rows, err = c.db.Query(c.queries.selectMessagesSinceID, topic, since.ID())
+		rows, err = rdb.Query(c.queries.selectMessagesSinceID, topic, since.ID())
 	}
 	if err != nil {
 		return nil, err
@@ -227,7 +229,7 @@ func (c *Cache) messagesSinceID(topic string, since model.SinceMarker, scheduled
 }
 
 func (c *Cache) messagesLatest(topic string) ([]*model.Message, error) {
-	rows, err := c.db.Query(c.queries.selectMessagesLatest, topic)
+	rows, err := c.db.ReadOnly().Query(c.queries.selectMessagesLatest, topic)
 	if err != nil {
 		return nil, err
 	}
@@ -266,7 +268,7 @@ func (c *Cache) MessagesExpired() ([]string, error) {
 
 // Message returns the message with the given ID, or ErrMessageNotFound if not found
 func (c *Cache) Message(id string) (*model.Message, error) {
-	rows, err := c.db.Query(c.queries.selectMessagesByID, id)
+	rows, err := c.db.ReadOnly().Query(c.queries.selectMessagesByID, id)
 	if err != nil {
 		return nil, err
 	}
@@ -295,7 +297,7 @@ func (c *Cache) MarkPublished(m *model.Message) error {
 
 // MessagesCount returns the total number of messages in the cache
 func (c *Cache) MessagesCount() (int, error) {
-	rows, err := c.db.Query(c.queries.selectMessagesCount)
+	rows, err := c.db.ReadOnly().Query(c.queries.selectMessagesCount)
 	if err != nil {
 		return 0, err
 	}
@@ -312,7 +314,7 @@ func (c *Cache) MessagesCount() (int, error) {
 
 // Topics returns a list of all topics with messages in the cache
 func (c *Cache) Topics() ([]string, error) {
-	rows, err := c.db.Query(c.queries.selectTopics)
+	rows, err := c.db.ReadOnly().Query(c.queries.selectTopics)
 	if err != nil {
 		return nil, err
 	}
@@ -426,7 +428,7 @@ func (c *Cache) MarkAttachmentsDeleted(ids ...string) error {
 
 // AttachmentBytesUsedBySender returns the total size of active attachments sent by the given sender
 func (c *Cache) AttachmentBytesUsedBySender(sender string) (int64, error) {
-	rows, err := c.db.Query(c.queries.selectAttachmentsSizeBySender, sender, time.Now().Unix())
+	rows, err := c.db.ReadOnly().Query(c.queries.selectAttachmentsSizeBySender, sender, time.Now().Unix())
 	if err != nil {
 		return 0, err
 	}
@@ -435,7 +437,7 @@ func (c *Cache) AttachmentBytesUsedBySender(sender string) (int64, error) {
 
 // AttachmentBytesUsedByUser returns the total size of active attachments for the given user
 func (c *Cache) AttachmentBytesUsedByUser(userID string) (int64, error) {
-	rows, err := c.db.Query(c.queries.selectAttachmentsSizeByUserID, userID, time.Now().Unix())
+	rows, err := c.db.ReadOnly().Query(c.queries.selectAttachmentsSizeByUserID, userID, time.Now().Unix())
 	if err != nil {
 		return 0, err
 	}
@@ -466,7 +468,7 @@ func (c *Cache) UpdateStats(messages int64) error {
 
 // Stats returns the total message count statistic
 func (c *Cache) Stats() (messages int64, err error) {
-	rows, err := c.db.Query(c.queries.selectStats)
+	rows, err := c.db.ReadOnly().Query(c.queries.selectStats)
 	if err != nil {
 		return 0, err
 	}
diff --git a/message/cache_postgres.go b/message/cache_postgres.go
index 0146f409..ba162da2 100644
--- a/message/cache_postgres.go
+++ b/message/cache_postgres.go
@@ -1,8 +1,9 @@
 package message
 
 import (
-	"database/sql"
 	"time"
+
+	"heckel.io/ntfy/v2/db"
 )
 
 // PostgreSQL runtime query constants
@@ -102,9 +103,9 @@ var postgresQueries = queries{
 }
 
 // NewPostgresStore creates a new PostgreSQL-backed message cache store using an existing database connection pool.
-func NewPostgresStore(db *sql.DB, batchSize int, batchTimeout time.Duration) (*Cache, error) {
-	if err := setupPostgres(db); err != nil {
+func NewPostgresStore(d *db.DB, batchSize int, batchTimeout time.Duration) (*Cache, error) {
+	if err := setupPostgres(d.Primary()); err != nil {
 		return nil, err
 	}
-	return newCache(db, postgresQueries, nil, batchSize, batchTimeout, false), nil
+	return newCache(d, postgresQueries, nil, batchSize, batchTimeout, false), nil
 }
diff --git a/message/cache_sqlite.go b/message/cache_sqlite.go
index f9d8605e..a36aba0e 100644
--- a/message/cache_sqlite.go
+++ b/message/cache_sqlite.go
@@ -8,6 +8,7 @@ import (
 	"time"
 
 	_ "github.com/mattn/go-sqlite3" // SQLite driver
+	"heckel.io/ntfy/v2/db"
 	"heckel.io/ntfy/v2/util"
 )
 
@@ -110,14 +111,14 @@ func NewSQLiteStore(filename, startupQueries string, cacheDuration time.Duration
 	if !util.FileExists(parentDir) {
 		return nil, fmt.Errorf("cache database directory %s does not exist or is not accessible", parentDir)
 	}
-	db, err := sql.Open("sqlite3", filename)
+	d, err := sql.Open("sqlite3", filename)
 	if err != nil {
 		return nil, err
 	}
-	if err := setupSQLite(db, startupQueries, cacheDuration); err != nil {
+	if err := setupSQLite(d, startupQueries, cacheDuration); err != nil {
 		return nil, err
 	}
-	return newCache(db, sqliteQueries, &sync.Mutex{}, batchSize, batchTimeout, nop), nil
+	return newCache(db.New(&db.Host{DB: d}, nil), sqliteQueries, &sync.Mutex{}, batchSize, batchTimeout, nop), nil
 }
 
 // NewMemStore creates an in-memory cache
diff --git a/message/cache_test.go b/message/cache_test.go
index eb992381..0fddc88b 100644
--- a/message/cache_test.go
+++ b/message/cache_test.go
@@ -827,3 +827,141 @@ func TestStore_MessageFieldRoundTrip(t *testing.T) {
 		require.Equal(t, `{"key":"value"}`, retrieved.Actions[1].Body)
 	})
 }
+
+func TestStore_AddMessage_InvalidUTF8(t *testing.T) {
+	forEachBackend(t, func(t *testing.T, s *message.Cache) {
+		// 0xc9 0x43: Latin-1 "ÉC" — 0xc9 starts a 2-byte UTF-8 sequence but 0x43 ('C') is not a continuation byte
+		m := model.NewDefaultMessage("mytopic", "\xc9Cas du serveur")
+		require.Nil(t, s.AddMessage(m))
+		messages, err := s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, 1, len(messages))
+		require.Equal(t, "\uFFFDCas du serveur", messages[0].Message)
+
+		// 0xae: Latin-1 "®" — isolated byte above 0x7F, not a valid UTF-8 start for single byte
+		m2 := model.NewDefaultMessage("mytopic", "Product\xae Pro")
+		require.Nil(t, s.AddMessage(m2))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "Product\uFFFD Pro", messages[1].Message)
+
+		// 0xe8 0x6d 0x65: Latin-1 "ème" — 0xe8 starts a 3-byte UTF-8 sequence but 0x6d ('m') is not a continuation byte
+		m3 := model.NewDefaultMessage("mytopic", "probl\xe8me critique")
+		require.Nil(t, s.AddMessage(m3))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "probl\uFFFDme critique", messages[2].Message)
+
+		// 0xb2: Latin-1 "²" — isolated byte in 0x80-0xBF range (UTF-8 continuation byte without lead)
+		m4 := model.NewDefaultMessage("mytopic", "CO\xb2 level high")
+		require.Nil(t, s.AddMessage(m4))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "CO\uFFFD level high", messages[3].Message)
+
+		// 0xe9 0x6d 0x61: Latin-1 "éma" — 0xe9 starts a 3-byte UTF-8 sequence but 0x6d ('m') is not a continuation byte
+		m5 := model.NewDefaultMessage("mytopic", "th\xe9matique")
+		require.Nil(t, s.AddMessage(m5))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "th\uFFFDmatique", messages[4].Message)
+
+		// 0xed 0x64 0x65: Latin-1 "íde" — 0xed starts a 3-byte UTF-8 sequence but 0x64 ('d') is not a continuation byte
+		m6 := model.NewDefaultMessage("mytopic", "vid\xed\x64eo surveillance")
+		require.Nil(t, s.AddMessage(m6))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "vid\uFFFDdeo surveillance", messages[5].Message)
+
+		// 0xf3 0x6e 0x3a 0x20: Latin-1 "ón: " — 0xf3 starts a 4-byte UTF-8 sequence but 0x6e ('n') is not a continuation byte
+		m7 := model.NewDefaultMessage("mytopic", "notificaci\xf3n: alerta")
+		require.Nil(t, s.AddMessage(m7))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "notificaci\uFFFDn: alerta", messages[6].Message)
+
+		// 0xb7: Latin-1 "·" — isolated continuation byte
+		m8 := model.NewDefaultMessage("mytopic", "item\xb7value")
+		require.Nil(t, s.AddMessage(m8))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "item\uFFFDvalue", messages[7].Message)
+
+		// 0xa8: Latin-1 "¨" — isolated continuation byte
+		m9 := model.NewDefaultMessage("mytopic", "na\xa8ve")
+		require.Nil(t, s.AddMessage(m9))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "na\uFFFDve", messages[8].Message)
+
+		// 0xdf 0x64: Latin-1 "ßd" — 0xdf starts a 2-byte UTF-8 sequence but 0x64 ('d') is not a continuation byte
+		m10 := model.NewDefaultMessage("mytopic", "gro\xdf\x64ruck")
+		require.Nil(t, s.AddMessage(m10))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "gro\uFFFDdruck", messages[9].Message)
+
+		// 0xe4 0x67 0x74: Latin-1 "ägt" — 0xe4 starts a 3-byte UTF-8 sequence but 0x67 ('g') is not a continuation byte
+		m11 := model.NewDefaultMessage("mytopic", "tr\xe4gt Last")
+		require.Nil(t, s.AddMessage(m11))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "tr\uFFFDgt Last", messages[10].Message)
+
+		// 0xe9 0x65 0x20: Latin-1 "ée " — 0xe9 starts a 3-byte UTF-8 sequence but 0x65 ('e') is not a continuation byte
+		m12 := model.NewDefaultMessage("mytopic", "journ\xe9\x65 termin\xe9\x65")
+		require.Nil(t, s.AddMessage(m12))
+		messages, err = s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, "journ\uFFFDe termin\uFFFDe", messages[11].Message)
+	})
+}
+
+func TestStore_AddMessage_NullByte(t *testing.T) {
+	forEachBackend(t, func(t *testing.T, s *message.Cache) {
+		// 0x00: NUL byte — valid UTF-8 but rejected by PostgreSQL
+		m := model.NewDefaultMessage("mytopic", "hello\x00world")
+		require.Nil(t, s.AddMessage(m))
+
+		messages, err := s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, 1, len(messages))
+		require.Equal(t, "helloworld", messages[0].Message)
+	})
+}
+
+func TestStore_AddMessage_InvalidUTF8InTitleAndTags(t *testing.T) {
+	forEachBackend(t, func(t *testing.T, s *message.Cache) {
+		// Invalid UTF-8 can arrive via HTTP headers (Title, Tags) which bypass body validation
+		m := model.NewDefaultMessage("mytopic", "valid message")
+		m.Title = "\xc9clipse du syst\xe8me"
+		m.Tags = []string{"probl\xe8me", "syst\xe9me"}
+		m.Click = "https://example.com/\xae"
+		require.Nil(t, s.AddMessage(m))
+
+		messages, err := s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, 1, len(messages))
+		require.Equal(t, "\uFFFDclipse du syst\uFFFDme", messages[0].Title)
+		require.Equal(t, "probl\uFFFDme", messages[0].Tags[0])
+		require.Equal(t, "syst\uFFFDme", messages[0].Tags[1])
+		require.Equal(t, "https://example.com/\uFFFD", messages[0].Click)
+	})
+}
+
+func TestStore_AddMessage_InvalidUTF8BatchDoesNotDropValidMessages(t *testing.T) {
+	forEachBackend(t, func(t *testing.T, s *message.Cache) {
+		// Previously, a single invalid message would roll back the entire batch transaction.
+		// Sanitization ensures all messages in a batch are written successfully.
+		msgs := []*model.Message{
+			model.NewDefaultMessage("mytopic", "valid message 1"),
+			model.NewDefaultMessage("mytopic", "notificaci\xf3n: alerta"),
+			model.NewDefaultMessage("mytopic", "valid message 3"),
+		}
+		require.Nil(t, s.AddMessages(msgs))
+
+		messages, err := s.Messages("mytopic", model.SinceAllMessages, false)
+		require.Nil(t, err)
+		require.Equal(t, 3, len(messages))
+	})
+}
diff --git a/mkdocs.yml b/mkdocs.yml
index f2a7afb7..76b5c1f9 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -42,8 +42,11 @@ extra:
       link: https://github.com/binwiederhier
 extra_javascript:
   - static/js/extra.js
+  - static/js/bcrypt.js
+  - static/js/config-generator.js
 extra_css:
   - static/css/extra.css
+  - static/css/config-generator.css
 
 markdown_extensions:
   - admonition
diff --git a/model/model.go b/model/model.go
index a8ecdf78..97fecf2d 100644
--- a/model/model.go
+++ b/model/model.go
@@ -70,6 +70,26 @@ func (m *Message) Context() log.Context {
 	return fields
 }
 
+// SanitizeUTF8 replaces invalid UTF-8 sequences and strips NUL bytes from all user-supplied
+// string fields. This is called early in the publish path so that all downstream consumers
+// (Firebase, WebPush, SMTP, cache) receive clean UTF-8 strings.
+func (m *Message) SanitizeUTF8() {
+	m.Topic = util.SanitizeUTF8(m.Topic)
+	m.Message = util.SanitizeUTF8(m.Message)
+	m.Title = util.SanitizeUTF8(m.Title)
+	m.Click = util.SanitizeUTF8(m.Click)
+	m.Icon = util.SanitizeUTF8(m.Icon)
+	m.ContentType = util.SanitizeUTF8(m.ContentType)
+	for i, tag := range m.Tags {
+		m.Tags[i] = util.SanitizeUTF8(tag)
+	}
+	if m.Attachment != nil {
+		m.Attachment.Name = util.SanitizeUTF8(m.Attachment.Name)
+		m.Attachment.Type = util.SanitizeUTF8(m.Attachment.Type)
+		m.Attachment.URL = util.SanitizeUTF8(m.Attachment.URL)
+	}
+}
+
 // ForJSON returns a copy of the message suitable for JSON output.
 // It clears the SequenceID if it equals the ID to reduce redundancy.
 func (m *Message) ForJSON() *Message {
diff --git a/server/config.go b/server/config.go
index 786f0d78..8ead312c 100644
--- a/server/config.go
+++ b/server/config.go
@@ -95,7 +95,8 @@ type Config struct {
 	ListenUnixMode                       fs.FileMode
 	KeyFile                              string
 	CertFile                             string
-	DatabaseURL                          string // PostgreSQL connection string (e.g. "postgres://user:pass@host:5432/ntfy")
+	DatabaseURL                          string   // PostgreSQL connection string (e.g. "postgres://user:pass@host:5432/ntfy")
+	DatabaseReplicaURLs                  []string // PostgreSQL read replica connection strings
 	FirebaseKeyFile                      string
 	CacheFile                            string
 	CacheDuration                        time.Duration
diff --git a/server/server.go b/server/server.go
index 329b0ab5..075d3079 100644
--- a/server/server.go
+++ b/server/server.go
@@ -4,7 +4,6 @@ import (
 	"bytes"
 	"context"
 	"crypto/sha256"
-	"database/sql"
 	"embed"
 	"encoding/base64"
 	"encoding/json"
@@ -33,6 +32,7 @@ import (
 	"github.com/prometheus/client_golang/prometheus/promhttp"
 	"golang.org/x/sync/errgroup"
 	"gopkg.in/yaml.v2"
+	"heckel.io/ntfy/v2/db"
 	"heckel.io/ntfy/v2/db/pg"
 	"heckel.io/ntfy/v2/log"
 	"heckel.io/ntfy/v2/message"
@@ -47,7 +47,7 @@ import (
 // Server is the main server, providing the UI and API for ntfy
 type Server struct {
 	config            *Config
-	db                *sql.DB // Shared PostgreSQL connection pool, nil when using SQLite
+	db                *db.DB // Shared PostgreSQL connection pool (with optional replicas), nil when using SQLite
 	httpServer        *http.Server
 	httpsServer       *http.Server
 	httpMetricsServer *http.Server
@@ -179,13 +179,26 @@ func New(conf *Config) (*Server, error) {
 		stripe = newStripeAPI()
 	}
 	// Open shared PostgreSQL connection pool if configured
-	var pool *sql.DB
+	var pool *db.DB
 	if conf.DatabaseURL != "" {
-		var err error
-		pool, err = pg.Open(conf.DatabaseURL)
+		primary, err := pg.Open(conf.DatabaseURL)
 		if err != nil {
 			return nil, err
 		}
+		var replicas []*db.Host
+		for _, replicaURL := range conf.DatabaseReplicaURLs {
+			r, err := pg.OpenReplica(replicaURL)
+			if err != nil {
+				// Close already-opened replicas before returning
+				for _, opened := range replicas {
+					opened.DB.Close()
+				}
+				primary.DB.Close()
+				return nil, fmt.Errorf("failed to open database replica: %w", err)
+			}
+			replicas = append(replicas, r)
+		}
+		pool = db.New(primary, replicas)
 	}
 	messageCache, err := createMessageCache(conf, pool)
 	if err != nil {
@@ -277,7 +290,7 @@ func New(conf *Config) (*Server, error) {
 	return s, nil
 }
 
-func createMessageCache(conf *Config, pool *sql.DB) (*message.Cache, error) {
+func createMessageCache(conf *Config, pool *db.DB) (*message.Cache, error) {
 	if conf.CacheDuration == 0 {
 		return message.NewNopStore()
 	} else if pool != nil {
@@ -867,6 +880,7 @@ func (s *Server) handlePublishInternal(r *http.Request, v *visitor) (*model.Mess
 	if m.Message == "" {
 		m.Message = emptyMessageBody
 	}
+	m.SanitizeUTF8()
 	delayed := m.Time > time.Now().Unix()
 	ev := logvrm(v, r, m).
 		Tag(tagPublish).
diff --git a/server/server_test.go b/server/server_test.go
index 24bf6cac..71743638 100644
--- a/server/server_test.go
+++ b/server/server_test.go
@@ -4441,3 +4441,88 @@ func TestServer_HandleError_SkipsWriteHeaderOnHijackedConnection(t *testing.T) {
 		}
 	})
 }
+
+func TestServer_Publish_InvalidUTF8InBody(t *testing.T) {
+	// All byte sequences from production logs, sent as message body
+	tests := []struct {
+		name    string
+		body    string
+		message string
+	}{
+		{"0xc9_0x43", "\xc9Cas du serveur", "\uFFFDCas du serveur"},                      // Latin-1 "ÉC"
+		{"0xae", "Product\xae Pro", "Product\uFFFD Pro"},                                 // Latin-1 "®"
+		{"0xe8_0x6d_0x65", "probl\xe8me critique", "probl\uFFFDme critique"},             // Latin-1 "ème"
+		{"0xb2", "CO\xb2 level high", "CO\uFFFD level high"},                             // Latin-1 "²"
+		{"0xe9_0x6d_0x61", "th\xe9matique", "th\uFFFDmatique"},                           // Latin-1 "éma"
+		{"0xed_0x64_0x65", "vid\xed\x64eo surveillance", "vid\uFFFDdeo surveillance"},    // Latin-1 "íde"
+		{"0xf3_0x6e_0x3a_0x20", "notificaci\xf3n: alerta", "notificaci\uFFFDn: alerta"},  // Latin-1 "ón: "
+		{"0xb7", "item\xb7value", "item\uFFFDvalue"},                                     // Latin-1 "·"
+		{"0xa8", "na\xa8ve", "na\uFFFDve"},                                               // Latin-1 "¨"
+		{"0x00", "hello\x00world", "helloworld"},                                         // NUL byte
+		{"0xdf_0x64", "gro\xdf\x64ruck", "gro\uFFFDdruck"},                               // Latin-1 "ßd"
+		{"0xe4_0x67_0x74", "tr\xe4gt Last", "tr\uFFFDgt Last"},                           // Latin-1 "ägt"
+		{"0xe9_0x65_0x20", "journ\xe9\x65 termin\xe9\x65", "journ\uFFFDe termin\uFFFDe"}, // Latin-1 "ée"
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			s := newTestServer(t, newTestConfig(t, ""))
+
+			// Publish via x-message header (the most common path for invalid UTF-8 from HTTP headers)
+			response := request(t, s, "PUT", "/mytopic", "", map[string]string{
+				"X-Message": tc.body,
+			})
+			require.Equal(t, 200, response.Code)
+			msg := toMessage(t, response.Body.String())
+			require.Equal(t, tc.message, msg.Message)
+
+			// Verify it was stored in the cache correctly
+			response = request(t, s, "GET", "/mytopic/json?poll=1", "", nil)
+			require.Equal(t, 200, response.Code)
+			msg = toMessage(t, response.Body.String())
+			require.Equal(t, tc.message, msg.Message)
+		})
+	}
+}
+
+func TestServer_Publish_InvalidUTF8InTitle(t *testing.T) {
+	s := newTestServer(t, newTestConfig(t, ""))
+	response := request(t, s, "PUT", "/mytopic", "valid body", map[string]string{
+		"Title": "\xc9clipse du syst\xe8me",
+	})
+	require.Equal(t, 200, response.Code)
+	msg := toMessage(t, response.Body.String())
+	require.Equal(t, "\uFFFDclipse du syst\uFFFDme", msg.Title)
+	require.Equal(t, "valid body", msg.Message)
+}
+
+func TestServer_Publish_InvalidUTF8InTags(t *testing.T) {
+	s := newTestServer(t, newTestConfig(t, ""))
+	response := request(t, s, "PUT", "/mytopic", "valid body", map[string]string{
+		"Tags": "probl\xe8me,syst\xe9me",
+	})
+	require.Equal(t, 200, response.Code)
+	msg := toMessage(t, response.Body.String())
+	require.Equal(t, "probl\uFFFDme", msg.Tags[0])
+	require.Equal(t, "syst\uFFFDme", msg.Tags[1])
+}
+
+func TestServer_Publish_InvalidUTF8WithFirebase(t *testing.T) {
+	// Verify that sanitization happens before Firebase dispatch, so Firebase
+	// receives clean UTF-8 strings rather than invalid byte sequences
+	sender := newTestFirebaseSender(10)
+	s := newTestServer(t, newTestConfig(t, ""))
+	s.firebaseClient = newFirebaseClient(sender, &testAuther{Allow: true})
+
+	response := request(t, s, "PUT", "/mytopic", "", map[string]string{
+		"X-Message": "notificaci\xf3n: alerta",
+		"Title":     "\xc9clipse",
+		"Tags":      "probl\xe8me",
+	})
+	require.Equal(t, 200, response.Code)
+
+	time.Sleep(100 * time.Millisecond) // Firebase publishing happens asynchronously
+	require.Equal(t, 1, len(sender.Messages()))
+	require.Equal(t, "notificaci\uFFFDn: alerta", sender.Messages()[0].Data["message"])
+	require.Equal(t, "\uFFFDclipse", sender.Messages()[0].Data["title"])
+	require.Equal(t, "probl\uFFFDme", sender.Messages()[0].Data["tags"])
+}
diff --git a/test/server.go b/test/server.go
index 5398cf9e..21e3af78 100644
--- a/test/server.go
+++ b/test/server.go
@@ -3,7 +3,7 @@ package test
 import (
 	"fmt"
 	"heckel.io/ntfy/v2/server"
-	"math/rand"
+	"net"
 	"net/http"
 	"path/filepath"
 	"testing"
@@ -16,7 +16,7 @@ func StartServer(t *testing.T) (*server.Server, int) {
 
 // StartServerWithConfig starts a server.Server with a random port and waits for the server to be up
 func StartServerWithConfig(t *testing.T, conf *server.Config) (*server.Server, int) {
-	port := 10000 + rand.Intn(30000)
+	port := findAvailablePort(t)
 	conf.ListenHTTP = fmt.Sprintf(":%d", port)
 	conf.AttachmentCacheDir = t.TempDir()
 	conf.CacheFile = filepath.Join(t.TempDir(), "cache.db")
@@ -33,6 +33,17 @@ func StartServerWithConfig(t *testing.T, conf *server.Config) (*server.Server, i
 	return s, port
 }
 
+// findAvailablePort asks the OS for a free port by binding to :0
+func findAvailablePort(t *testing.T) int {
+	listener, err := net.Listen("tcp", ":0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	port := listener.Addr().(*net.TCPAddr).Port
+	listener.Close()
+	return port
+}
+
 // StopServer stops the test server and waits for the port to be down
 func StopServer(t *testing.T, s *server.Server, port int) {
 	s.Stop()
diff --git a/tools/pgimport/main.go b/tools/pgimport/main.go
index cbc171dd..77c1d4cf 100644
--- a/tools/pgimport/main.go
+++ b/tools/pgimport/main.go
@@ -65,12 +65,12 @@ const (
 			key TEXT PRIMARY KEY,
 			value BIGINT
 		);
-		INSERT INTO message_stats (key, value) VALUES ('messages', 0);
+		INSERT INTO message_stats (key, value) VALUES ('messages', 0) ON CONFLICT (key) DO NOTHING;
 		CREATE TABLE IF NOT EXISTS schema_version (
 			store TEXT PRIMARY KEY,
 			version INT NOT NULL
 		);
-		INSERT INTO schema_version (store, version) VALUES ('message', 14);
+		INSERT INTO schema_version (store, version) VALUES ('message', 14) ON CONFLICT (store) DO NOTHING;
 	`
 
 	// Initial PostgreSQL schema for user store (from user/manager_postgres_schema.go)
@@ -146,7 +146,7 @@ const (
 		INSERT INTO "user" (id, user_name, pass, role, sync_topic, provisioned, created)
 		VALUES ('` + everyoneID + `', '*', '', 'anonymous', '', false, EXTRACT(EPOCH FROM NOW())::BIGINT)
 		ON CONFLICT (id) DO NOTHING;
-		INSERT INTO schema_version (store, version) VALUES ('user', 6);
+		INSERT INTO schema_version (store, version) VALUES ('user', 6) ON CONFLICT (store) DO NOTHING;
 	`
 
 	// Initial PostgreSQL schema for web push store (from webpush/store_postgres.go)
@@ -174,7 +174,7 @@ const (
 			store TEXT PRIMARY KEY,
 			version INT NOT NULL
 		);
-		INSERT INTO schema_version (store, version) VALUES ('webpush', 1);
+		INSERT INTO schema_version (store, version) VALUES ('webpush', 1) ON CONFLICT (store) DO NOTHING;
 	`
 )
 
@@ -185,6 +185,7 @@ var flags = []cli.Flag{
 	altsrc.NewStringFlag(&cli.StringFlag{Name: "auth-file", Aliases: []string{"auth_file"}, Usage: "SQLite user/auth database file path"}),
 	altsrc.NewStringFlag(&cli.StringFlag{Name: "web-push-file", Aliases: []string{"web_push_file"}, Usage: "SQLite web push database file path"}),
 	&cli.BoolFlag{Name: "create-schema", Usage: "create initial PostgreSQL schema before importing"},
+	&cli.BoolFlag{Name: "pre-import", Usage: "pre-import messages while ntfy is still running (only imports messages)"},
 }
 
 func main() {
@@ -207,10 +208,17 @@ func execImport(c *cli.Context) error {
 	cacheFile := c.String("cache-file")
 	authFile := c.String("auth-file")
 	webPushFile := c.String("web-push-file")
+	preImport := c.Bool("pre-import")
 
 	if databaseURL == "" {
 		return fmt.Errorf("database-url must be set (via --database-url or config file)")
 	}
+	if preImport {
+		if cacheFile == "" {
+			return fmt.Errorf("--cache-file must be set when using --pre-import")
+		}
+		return execPreImport(c, databaseURL, cacheFile)
+	}
 	if cacheFile == "" && authFile == "" && webPushFile == "" {
 		return fmt.Errorf("at least one of --cache-file, --auth-file, or --web-push-file must be set")
 	}
@@ -236,10 +244,11 @@ func execImport(c *cli.Context) error {
 	}
 	fmt.Println()
 
-	pgDB, err := pg.Open(databaseURL)
+	pgHost, err := pg.Open(databaseURL)
 	if err != nil {
 		return fmt.Errorf("cannot connect to PostgreSQL: %w", err)
 	}
+	pgDB := pgHost.DB
 	defer pgDB.Close()
 
 	if c.Bool("create-schema") {
@@ -260,7 +269,8 @@ func execImport(c *cli.Context) error {
 		if err := verifySchemaVersion(pgDB, "message", expectedMessageSchemaVersion); err != nil {
 			return err
 		}
-		if err := importMessages(cacheFile, pgDB); err != nil {
+		sinceTime := maxMessageTime(pgDB)
+		if err := importMessages(cacheFile, pgDB, sinceTime); err != nil {
 			return fmt.Errorf("cannot import messages: %w", err)
 		}
 	}
@@ -299,6 +309,54 @@ func execImport(c *cli.Context) error {
 	return nil
 }
 
+func execPreImport(c *cli.Context, databaseURL, cacheFile string) error {
+	fmt.Println("pgimport - PRE-IMPORT mode (ntfy can keep running)")
+	fmt.Println()
+	fmt.Println("Source:")
+	printSource("  Cache file:    ", cacheFile)
+	fmt.Println()
+	fmt.Println("Target:")
+	fmt.Printf("  Database URL:  %s\n", maskPassword(databaseURL))
+	fmt.Println()
+	fmt.Println("This will pre-import messages into PostgreSQL while ntfy is still running.")
+	fmt.Println("After this completes, stop ntfy and run pgimport again without --pre-import")
+	fmt.Println("to import remaining messages, users, and web push subscriptions.")
+	fmt.Print("Continue? (y/n): ")
+
+	var answer string
+	fmt.Scanln(&answer)
+	if strings.TrimSpace(strings.ToLower(answer)) != "y" {
+		fmt.Println("Aborted.")
+		return nil
+	}
+	fmt.Println()
+
+	pgHost, err := pg.Open(databaseURL)
+	if err != nil {
+		return fmt.Errorf("cannot connect to PostgreSQL: %w", err)
+	}
+	pgDB := pgHost.DB
+	defer pgDB.Close()
+
+	if c.Bool("create-schema") {
+		if err := createSchema(pgDB, cacheFile, "", ""); err != nil {
+			return fmt.Errorf("cannot create schema: %w", err)
+		}
+	}
+
+	if err := verifySchemaVersion(pgDB, "message", expectedMessageSchemaVersion); err != nil {
+		return err
+	}
+	if err := importMessages(cacheFile, pgDB, 0); err != nil {
+		return fmt.Errorf("cannot import messages: %w", err)
+	}
+
+	fmt.Println()
+	fmt.Println("Pre-import complete. Now stop ntfy and run pgimport again without --pre-import")
+	fmt.Println("to import any remaining messages, users, and web push subscriptions.")
+	return nil
+}
+
 func createSchema(pgDB *sql.DB, cacheFile, authFile, webPushFile string) error {
 	fmt.Println("Creating initial PostgreSQL schema ...")
 	// User schema must be created before message schema, because message_stats and
@@ -644,16 +702,41 @@ func importUserPhones(sqlDB, pgDB *sql.DB) (int, error) {
 
 // Message import
 
-func importMessages(sqliteFile string, pgDB *sql.DB) error {
+const preImportTimeDelta = 30 // seconds to subtract from max time to account for in-flight messages
+
+// maxMessageTime returns the maximum message time in PostgreSQL minus a small buffer,
+// or 0 if there are no messages yet. This is used after a --pre-import run to only
+// import messages that arrived since the pre-import.
+func maxMessageTime(pgDB *sql.DB) int64 {
+	var maxTime sql.NullInt64
+	if err := pgDB.QueryRow(`SELECT MAX(time) FROM message`).Scan(&maxTime); err != nil || !maxTime.Valid || maxTime.Int64 == 0 {
+		return 0
+	}
+	sinceTime := maxTime.Int64 - preImportTimeDelta
+	if sinceTime < 0 {
+		return 0
+	}
+	fmt.Printf("Pre-imported messages detected (max time: %d), importing delta (since time %d) ...\n", maxTime.Int64, sinceTime)
+	return sinceTime
+}
+
+func importMessages(sqliteFile string, pgDB *sql.DB, sinceTime int64) error {
 	sqlDB, err := openSQLite(sqliteFile)
 	if err != nil {
 		fmt.Printf("Skipping message import: %s\n", err)
 		return nil
 	}
 	defer sqlDB.Close()
-	fmt.Printf("Importing messages from %s ...\n", sqliteFile)
 
-	rows, err := sqlDB.Query(`SELECT mid, sequence_id, time, event, expires, topic, message, title, priority, tags, click, icon, actions, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_deleted, sender, user, content_type, encoding, published FROM messages`)
+	query := `SELECT mid, sequence_id, time, event, expires, topic, message, title, priority, tags, click, icon, actions, attachment_name, attachment_type, attachment_size, attachment_expires, attachment_url, attachment_deleted, sender, user, content_type, encoding, published FROM messages`
+	var rows *sql.Rows
+	if sinceTime > 0 {
+		fmt.Printf("Importing messages from %s (since time %d) ...\n", sqliteFile, sinceTime)
+		rows, err = sqlDB.Query(query+` WHERE time >= ?`, sinceTime)
+	} else {
+		fmt.Printf("Importing messages from %s ...\n", sqliteFile)
+		rows, err = sqlDB.Query(query)
+	}
 	if err != nil {
 		return fmt.Errorf("querying messages: %w", err)
 	}
@@ -836,7 +919,9 @@ func importWebPush(sqliteFile string, pgDB *sql.DB) error {
 }
 
 func toUTF8(s string) string {
-	return strings.ToValidUTF8(s, "\uFFFD")
+	s = strings.ToValidUTF8(s, "\uFFFD")
+	s = strings.ReplaceAll(s, "\x00", "")
+	return s
 }
 
 // Verification
diff --git a/user/manager.go b/user/manager.go
index 0ee6a6e1..28243a24 100644
--- a/user/manager.go
+++ b/user/manager.go
@@ -49,7 +49,7 @@ var (
 // Manager handles user authentication, authorization, and management
 type Manager struct {
 	config     *Config
-	db         *sql.DB
+	db         *db.DB
 	queries    queries
 	statsQueue map[string]*Stats       // "Queue" to asynchronously write user stats to the database (UserID -> Stats)
 	tokenQueue map[string]*TokenUpdate // "Queue" to asynchronously write token access stats to the database (Token ID -> TokenUpdate)
@@ -58,7 +58,7 @@ type Manager struct {
 
 var _ Auther = (*Manager)(nil)
 
-func newManager(db *sql.DB, queries queries, config *Config) (*Manager, error) {
+func newManager(d *db.DB, queries queries, config *Config) (*Manager, error) {
 	if config.BcryptCost <= 0 {
 		config.BcryptCost = DefaultUserPasswordBcryptCost
 	}
@@ -67,7 +67,7 @@ func newManager(db *sql.DB, queries queries, config *Config) (*Manager, error) {
 	}
 	manager := &Manager{
 		config:     config,
-		db:         db,
+		db:         d,
 		statsQueue: make(map[string]*Stats),
 		tokenQueue: make(map[string]*TokenUpdate),
 		queries:    queries,
@@ -415,7 +415,7 @@ func (a *Manager) userByToken(token string) (*User, error) {
 
 // UserByStripeCustomer returns the user with the given Stripe customer ID if it exists, or ErrUserNotFound otherwise
 func (a *Manager) UserByStripeCustomer(customerID string) (*User, error) {
-	rows, err := a.db.Query(a.queries.selectUserByStripeCustomerID, customerID)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectUserByStripeCustomerID, customerID)
 	if err != nil {
 		return nil, err
 	}
@@ -425,7 +425,7 @@ func (a *Manager) UserByStripeCustomer(customerID string) (*User, error) {
 // Users returns a list of users. It loads all users in a single query
 // rather than one query per user to avoid N+1 performance issues.
 func (a *Manager) Users() ([]*User, error) {
-	rows, err := a.db.Query(a.queries.selectUsers)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectUsers)
 	if err != nil {
 		return nil, err
 	}
@@ -434,7 +434,7 @@ func (a *Manager) Users() ([]*User, error) {
 
 // UsersCount returns the number of users in the database
 func (a *Manager) UsersCount() (int64, error) {
-	rows, err := a.db.Query(a.queries.selectUserCount)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectUserCount)
 	if err != nil {
 		return 0, err
 	}
@@ -642,7 +642,7 @@ func (a *Manager) AllowReservation(username string, topic string) error {
 // - Furthermore, the query prioritizes more specific permissions (longer!) over more generic ones, e.g. "test*" > "*"
 // - It also prioritizes write permissions over read permissions
 func (a *Manager) authorizeTopicAccess(usernameOrEveryone, topic string) (read, write, found bool, err error) {
-	rows, err := a.db.Query(a.queries.selectTopicPerms, Everyone, usernameOrEveryone, topic)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectTopicPerms, Everyone, usernameOrEveryone, topic)
 	if err != nil {
 		return false, false, false, err
 	}
@@ -660,7 +660,7 @@ func (a *Manager) authorizeTopicAccess(usernameOrEveryone, topic string) (read,
 
 // AllGrants returns all user-specific access control entries, mapped to their respective user IDs
 func (a *Manager) AllGrants() (map[string][]Grant, error) {
-	rows, err := a.db.Query(a.queries.selectUserAllAccess)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectUserAllAccess)
 	if err != nil {
 		return nil, err
 	}
@@ -688,7 +688,7 @@ func (a *Manager) AllGrants() (map[string][]Grant, error) {
 
 // Grants returns all user-specific access control entries
 func (a *Manager) Grants(username string) ([]Grant, error) {
-	rows, err := a.db.Query(a.queries.selectUserAccess, username)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectUserAccess, username)
 	if err != nil {
 		return nil, err
 	}
@@ -753,7 +753,7 @@ func (a *Manager) RemoveReservations(username string, topics ...string) error {
 
 // Reservations returns all user-owned topics, and the associated everyone-access
 func (a *Manager) Reservations(username string) ([]Reservation, error) {
-	rows, err := a.db.Query(a.queries.selectUserReservations, Everyone, username)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectUserReservations, Everyone, username)
 	if err != nil {
 		return nil, err
 	}
@@ -796,7 +796,7 @@ func (a *Manager) HasReservation(username, topic string) (bool, error) {
 
 // ReservationsCount returns the number of reservations owned by this user
 func (a *Manager) ReservationsCount(username string) (int64, error) {
-	rows, err := a.db.Query(a.queries.selectUserReservationsCount, username)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectUserReservationsCount, username)
 	if err != nil {
 		return 0, err
 	}
@@ -962,7 +962,7 @@ func (a *Manager) canChangeToken(userID, token string) error {
 
 // Token returns a specific token for a user
 func (a *Manager) Token(userID, token string) (*Token, error) {
-	rows, err := a.db.Query(a.queries.selectToken, userID, token)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectToken, userID, token)
 	if err != nil {
 		return nil, err
 	}
@@ -972,7 +972,7 @@ func (a *Manager) Token(userID, token string) (*Token, error) {
 
 // Tokens returns all existing tokens for the user with the given user ID
 func (a *Manager) Tokens(userID string) ([]*Token, error) {
-	rows, err := a.db.Query(a.queries.selectTokens, userID)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectTokens, userID)
 	if err != nil {
 		return nil, err
 	}
@@ -991,7 +991,7 @@ func (a *Manager) Tokens(userID string) ([]*Token, error) {
 }
 
 func (a *Manager) allProvisionedTokens() ([]*Token, error) {
-	rows, err := a.db.Query(a.queries.selectAllProvisionedTokens)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectAllProvisionedTokens)
 	if err != nil {
 		return nil, err
 	}
@@ -1114,7 +1114,7 @@ func (a *Manager) RemoveTier(code string) error {
 
 // Tiers returns a list of all Tier structs
 func (a *Manager) Tiers() ([]*Tier, error) {
-	rows, err := a.db.Query(a.queries.selectTiers)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectTiers)
 	if err != nil {
 		return nil, err
 	}
@@ -1134,7 +1134,7 @@ func (a *Manager) Tiers() ([]*Tier, error) {
 
 // Tier returns a Tier based on the code, or ErrTierNotFound if it does not exist
 func (a *Manager) Tier(code string) (*Tier, error) {
-	rows, err := a.db.Query(a.queries.selectTierByCode, code)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectTierByCode, code)
 	if err != nil {
 		return nil, err
 	}
@@ -1144,7 +1144,7 @@ func (a *Manager) Tier(code string) (*Tier, error) {
 
 // TierByStripePrice returns a Tier based on the Stripe price ID, or ErrTierNotFound if it does not exist
 func (a *Manager) TierByStripePrice(priceID string) (*Tier, error) {
-	rows, err := a.db.Query(a.queries.selectTierByPriceID, priceID, priceID)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectTierByPriceID, priceID, priceID)
 	if err != nil {
 		return nil, err
 	}
@@ -1185,7 +1185,7 @@ func (a *Manager) readTier(rows *sql.Rows) (*Tier, error) {
 
 // PhoneNumbers returns all phone numbers for the user with the given user ID
 func (a *Manager) PhoneNumbers(userID string) ([]string, error) {
-	rows, err := a.db.Query(a.queries.selectPhoneNumbers, userID)
+	rows, err := a.db.ReadOnly().Query(a.queries.selectPhoneNumbers, userID)
 	if err != nil {
 		return nil, err
 	}
diff --git a/user/manager_postgres.go b/user/manager_postgres.go
index 7138ae2c..77c35ece 100644
--- a/user/manager_postgres.go
+++ b/user/manager_postgres.go
@@ -1,7 +1,7 @@
 package user
 
 import (
-	"database/sql"
+	"heckel.io/ntfy/v2/db"
 )
 
 // PostgreSQL queries
@@ -278,9 +278,9 @@ var postgresQueries = queries{
 }
 
 // NewPostgresManager creates a new Manager backed by a PostgreSQL database
-func NewPostgresManager(db *sql.DB, config *Config) (*Manager, error) {
-	if err := setupPostgres(db); err != nil {
+func NewPostgresManager(d *db.DB, config *Config) (*Manager, error) {
+	if err := setupPostgres(d.Primary()); err != nil {
 		return nil, err
 	}
-	return newManager(db, postgresQueries, config)
+	return newManager(d, postgresQueries, config)
 }
diff --git a/user/manager_sqlite.go b/user/manager_sqlite.go
index b4068599..e92c6349 100644
--- a/user/manager_sqlite.go
+++ b/user/manager_sqlite.go
@@ -7,6 +7,7 @@ import (
 
 	_ "github.com/mattn/go-sqlite3" // SQLite driver
 
+	"heckel.io/ntfy/v2/db"
 	"heckel.io/ntfy/v2/util"
 )
 
@@ -280,15 +281,15 @@ func NewSQLiteManager(filename, startupQueries string, config *Config) (*Manager
 	if !util.FileExists(parentDir) {
 		return nil, fmt.Errorf("user database directory %s does not exist or is not accessible", parentDir)
 	}
-	db, err := sql.Open("sqlite3", filename)
+	d, err := sql.Open("sqlite3", filename)
 	if err != nil {
 		return nil, err
 	}
-	if err := setupSQLite(db); err != nil {
+	if err := setupSQLite(d); err != nil {
 		return nil, err
 	}
-	if err := runSQLiteStartupQueries(db, startupQueries); err != nil {
+	if err := runSQLiteStartupQueries(d, startupQueries); err != nil {
 		return nil, err
 	}
-	return newManager(db, sqliteQueries, config)
+	return newManager(db.New(&db.Host{DB: d}, nil), sqliteQueries, config)
 }
diff --git a/user/manager_test.go b/user/manager_test.go
index 53cae1d1..3e023909 100644
--- a/user/manager_test.go
+++ b/user/manager_test.go
@@ -11,6 +11,7 @@ import (
 
 	"github.com/stretchr/testify/require"
 	"golang.org/x/crypto/bcrypt"
+	"heckel.io/ntfy/v2/db"
 	"heckel.io/ntfy/v2/db/pg"
 	dbtest "heckel.io/ntfy/v2/db/test"
 	"heckel.io/ntfy/v2/util"
@@ -36,9 +37,9 @@ func forEachBackend(t *testing.T, f func(t *testing.T, newManager newManagerFunc
 	t.Run("postgres", func(t *testing.T) {
 		schemaDSN := dbtest.CreateTestPostgresSchema(t)
 		f(t, func(config *Config) *Manager {
-			pool, err := pg.Open(schemaDSN)
+			host, err := pg.Open(schemaDSN)
 			require.Nil(t, err)
-			a, err := NewPostgresManager(pool, config)
+			a, err := NewPostgresManager(db.New(host, nil), config)
 			require.Nil(t, err)
 			return a
 		})
@@ -1734,8 +1735,8 @@ func TestMigrationFrom4(t *testing.T) {
 	require.Nil(t, a.Authorize(nil, "up", PermissionRead)) // % matches 0 or more characters
 }
 
-func checkSchemaVersion(t *testing.T, db *sql.DB) {
-	rows, err := db.Query(`SELECT version FROM schemaVersion`)
+func checkSchemaVersion(t *testing.T, d *db.DB) {
+	rows, err := d.Query(`SELECT version FROM schemaVersion`)
 	require.Nil(t, err)
 	require.True(t, rows.Next())
 
@@ -1771,7 +1772,7 @@ func newTestManagerFromConfig(t *testing.T, newManager newManagerFunc, conf *Con
 	return a
 }
 
-func testDB(a *Manager) *sql.DB {
+func testDB(a *Manager) *db.DB {
 	return a.db
 }
 
diff --git a/util/util.go b/util/util.go
index 85b2fbd4..be349691 100644
--- a/util/util.go
+++ b/util/util.go
@@ -17,6 +17,7 @@ import (
 	"strings"
 	"sync"
 	"time"
+	"unicode/utf8"
 
 	"github.com/gabriel-vasile/mimetype"
 	"golang.org/x/term"
@@ -434,3 +435,22 @@ func Int(v int) *int {
 func Time(v time.Time) *time.Time {
 	return &v
 }
+
+// SanitizeUTF8 ensures a string is safe to store in PostgreSQL by handling two cases:
+//
+//  1. Invalid UTF-8 sequences: Some clients send Latin-1/ISO-8859-1 encoded text (e.g. accented
+//     characters like é, ñ, ß) in HTTP headers or SMTP messages. Go treats these as raw bytes in
+//     strings, but PostgreSQL rejects them. Any invalid UTF-8 byte is replaced with the Unicode
+//     replacement character (U+FFFD, "�") so the message is still delivered rather than lost.
+//
+//  2. NUL bytes (0x00): These are valid in UTF-8 but PostgreSQL TEXT columns reject them.
+//     They are stripped entirely.
+func SanitizeUTF8(s string) string {
+	if !utf8.ValidString(s) {
+		s = strings.ToValidUTF8(s, "\xef\xbf\xbd") // U+FFFD
+	}
+	if strings.ContainsRune(s, 0) {
+		s = strings.ReplaceAll(s, "\x00", "")
+	}
+	return s
+}
diff --git a/web/package-lock.json b/web/package-lock.json
index e775138f..bec8660f 100644
--- a/web/package-lock.json
+++ b/web/package-lock.json
@@ -4324,9 +4324,9 @@
       }
     },
     "node_modules/es-iterator-helpers": {
-      "version": "1.2.2",
-      "resolved": "https://registry.npmjs.org/es-iterator-helpers/-/es-iterator-helpers-1.2.2.tgz",
-      "integrity": "sha512-BrUQ0cPTB/IwXj23HtwHjS9n7O4h9FX94b4xc5zlTHxeLgTAdzYUDyy6KdExAl9lbN5rtfe44xpjpmj9grxs5w==",
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/es-iterator-helpers/-/es-iterator-helpers-1.3.0.tgz",
+      "integrity": "sha512-04cg8iJFDOxWcYlu0GFFWgs7vtaEPCmr5w1nrj9V3z3axu/48HCMwK6VMp45Zh3ZB+xLP1ifbJfrq86+1ypKKQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
@@ -4345,6 +4345,7 @@
         "has-symbols": "^1.1.0",
         "internal-slot": "^1.1.0",
         "iterator.prototype": "^1.1.5",
+        "math-intrinsics": "^1.1.0",
         "safe-array-concat": "^1.1.3"
       },
       "engines": {
@@ -5065,9 +5066,9 @@
       }
     },
     "node_modules/flatted": {
-      "version": "3.3.4",
-      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.3.4.tgz",
-      "integrity": "sha512-3+mMldrTAPdta5kjX2G2J7iX4zxtnwpdA8Tr2ZSjkyPSanvbZAcy6flmtnXbEybHrDcU9641lxrMfFuUxVz9vA==",
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/flatted/-/flatted-3.4.1.tgz",
+      "integrity": "sha512-IxfVbRFVlV8V/yRaGzk0UVIcsKKHMSfYw66T/u4nTwlWteQePsxe//LjudR1AMX4tZW3WFCh3Zqa/sjlqpbURQ==",
       "dev": true,
       "license": "ISC"
     },
diff --git a/web/public/static/langs/es.json b/web/public/static/langs/es.json
index 598d271a..a56f9e13 100644
--- a/web/public/static/langs/es.json
+++ b/web/public/static/langs/es.json
@@ -120,7 +120,7 @@
     "publish_dialog_priority_low": "Prioridad baja",
     "publish_dialog_priority_high": "Prioridad alta",
     "publish_dialog_delay_label": "Retraso",
-    "publish_dialog_title_placeholder": "Título de la notificación, por ejemplo, Alerta de espacio en disco",
+    "publish_dialog_title_placeholder": "Título de la notificación, ej. Alerta de espacio en disco",
     "publish_dialog_details_examples_description": "Para ver ejemplos y una descripción detallada de todas las funciones de envío, consulte la <docsLink>documentación</docsLink>.",
     "publish_dialog_attach_placeholder": "Adjuntar un archivo por URL, por ejemplo, https://f-droid.org/F-Droid.apk",
     "publish_dialog_filename_placeholder": "Nombre del archivo adjunto",
diff --git a/webpush/store.go b/webpush/store.go
index 9a93a074..02b7552e 100644
--- a/webpush/store.go
+++ b/webpush/store.go
@@ -24,7 +24,7 @@ var (
 
 // Store holds the database connection and queries for web push subscriptions.
 type Store struct {
-	db      *sql.DB
+	db      *db.DB
 	queries queries
 }
 
@@ -83,7 +83,7 @@ func (s *Store) UpsertSubscription(endpoint string, auth, p256dh, userID string,
 
 // SubscriptionsForTopic returns all subscriptions for the given topic.
 func (s *Store) SubscriptionsForTopic(topic string) ([]*Subscription, error) {
-	rows, err := s.db.Query(s.queries.selectSubscriptionsForTopic, topic)
+	rows, err := s.db.ReadOnly().Query(s.queries.selectSubscriptionsForTopic, topic)
 	if err != nil {
 		return nil, err
 	}
@@ -93,7 +93,7 @@ func (s *Store) SubscriptionsForTopic(topic string) ([]*Subscription, error) {
 
 // SubscriptionsExpiring returns all subscriptions that have not been updated for a given time period.
 func (s *Store) SubscriptionsExpiring(warnAfter time.Duration) ([]*Subscription, error) {
-	rows, err := s.db.Query(s.queries.selectSubscriptionsExpiringSoon, time.Now().Add(-warnAfter).Unix())
+	rows, err := s.db.ReadOnly().Query(s.queries.selectSubscriptionsExpiringSoon, time.Now().Add(-warnAfter).Unix())
 	if err != nil {
 		return nil, err
 	}
diff --git a/webpush/store_postgres.go b/webpush/store_postgres.go
index ec541d37..1c9adf0a 100644
--- a/webpush/store_postgres.go
+++ b/webpush/store_postgres.go
@@ -73,12 +73,12 @@ const (
 )
 
 // NewPostgresStore creates a new PostgreSQL-backed web push store using an existing database connection pool.
-func NewPostgresStore(db *sql.DB) (*Store, error) {
-	if err := setupPostgres(db); err != nil {
+func NewPostgresStore(d *db.DB) (*Store, error) {
+	if err := setupPostgres(d.Primary()); err != nil {
 		return nil, err
 	}
 	return &Store{
-		db: db,
+		db: d,
 		queries: queries{
 			selectSubscriptionIDByEndpoint:             postgresSelectSubscriptionIDByEndpointQuery,
 			selectSubscriptionCountBySubscriberIP:      postgresSelectSubscriptionCountBySubscriberIPQuery,
@@ -97,11 +97,11 @@ func NewPostgresStore(db *sql.DB) (*Store, error) {
 	}, nil
 }
 
-func setupPostgres(db *sql.DB) error {
+func setupPostgres(d *sql.DB) error {
 	var schemaVersion int
-	err := db.QueryRow(postgresSelectSchemaVersionQuery).Scan(&schemaVersion)
+	err := d.QueryRow(postgresSelectSchemaVersionQuery).Scan(&schemaVersion)
 	if err != nil {
-		return setupNewPostgres(db)
+		return setupNewPostgres(d)
 	}
 	if schemaVersion > pgCurrentSchemaVersion {
 		return fmt.Errorf("unexpected schema version: version %d is higher than current version %d", schemaVersion, pgCurrentSchemaVersion)
@@ -109,8 +109,8 @@ func setupPostgres(db *sql.DB) error {
 	return nil
 }
 
-func setupNewPostgres(sqlDB *sql.DB) error {
-	return db.ExecTx(sqlDB, func(tx *sql.Tx) error {
+func setupNewPostgres(d *sql.DB) error {
+	return db.ExecTx(d, func(tx *sql.Tx) error {
 		if _, err := tx.Exec(postgresCreateTablesQuery); err != nil {
 			return err
 		}
diff --git a/webpush/store_sqlite.go b/webpush/store_sqlite.go
index 4ef78140..fcf49fcf 100644
--- a/webpush/store_sqlite.go
+++ b/webpush/store_sqlite.go
@@ -79,18 +79,18 @@ const (
 
 // NewSQLiteStore creates a new SQLite-backed web push store.
 func NewSQLiteStore(filename, startupQueries string) (*Store, error) {
-	db, err := sql.Open("sqlite3", filename)
+	d, err := sql.Open("sqlite3", filename)
 	if err != nil {
 		return nil, err
 	}
-	if err := setupSQLite(db); err != nil {
+	if err := setupSQLite(d); err != nil {
 		return nil, err
 	}
-	if err := runSQLiteStartupQueries(db, startupQueries); err != nil {
+	if err := runSQLiteStartupQueries(d, startupQueries); err != nil {
 		return nil, err
 	}
 	return &Store{
-		db: db,
+		db: db.New(&db.Host{DB: d}, nil),
 		queries: queries{
 			selectSubscriptionIDByEndpoint:             sqliteSelectSubscriptionIDByEndpointQuery,
 			selectSubscriptionCountBySubscriberIP:      sqliteSelectSubscriptionCountBySubscriberIPQuery,