diff --git a/bin/migrate-sqlite-to-pg.php b/bin/migrate-sqlite-to-pg.php
new file mode 100644
index 0000000..66efdf0
--- /dev/null
+++ b/bin/migrate-sqlite-to-pg.php
@@ -0,0 +1,46 @@
+<?php
+// Einmalige Daten-Migration: SQLite /data/essens.db -> PostgreSQL (DATABASE_URL)
+// Aufruf im App-Container: php bin/migrate-sqlite-to-pg.php
+declare(strict_types=1);
+
+$sqlitePath = '/data/essens.db';
+$pgUrl = $_SERVER['DATABASE_URL'] ?? getenv('DATABASE_URL');
+if (!$pgUrl) {
+    fwrite(STDERR, "DATABASE_URL nicht gesetzt\n");
+    exit(1);
+}
+
+$sqlite = new PDO('sqlite:' . $sqlitePath);
+$sqlite->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+$pg = new PDO($pgUrl);
+$pg->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+$copy = $pg->beginTransaction();
+try {
+    $userStmt = $pg->prepare('INSERT INTO essens_user (id, username, email, kc_sub, created_am, updated_am) VALUES (?, ?, ?, ?, ?, ?)');
+    $mealStmt = $pg->prepare('INSERT INTO essens_mahlzeiten (id, name, notiz, wochentage, sort_order, status, gegessen_am, erstellt_am, aktualisiert_am) VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?)');
+
+    foreach ($sqlite->query('SELECT id, username, email, kc_sub, created_am, updated_am FROM essens_user') as $r) {
+        $userStmt->execute([$r['id'], $r['username'], $r['email'], $r['kc_sub'] ?: null, $r['created_am'] ?: null, $r['updated_am'] ?: null]);
+    }
+    foreach ($sqlite->query('SELECT id, name, notiz, wochentage, sort_order, status, gegessen_am, erstellt_am, aktualisiert_am FROM essens_mahlzeiten') as $r) {
+        $mealStmt->execute([
+            $r['id'], $r['name'], $r['notiz'] ?: null,
+            $r['wochentage'] ?: null,
+            (int) $r['sort_order'], $r['status'],
+            $r['gegessen_am'] ?: null, $r['erstellt_am'] ?: null, $r['aktualisiert_am'] ?: null,
+        ]);
+    }
+
+    $pg->exec("SELECT setval('essens_user_id_seq', COALESCE(MAX(id), 0) + 1, false) FROM essens_user");
+    $pg->exec("SELECT setval('essens_mahlzeiten_id_seq', COALESCE(MAX(id), 0) + 1, false) FROM essens_mahlzeiten");
+    $copy->commit();
+} catch (Throwable $e) {
+    $copy->rollBack();
+    throw $e;
+}
+
+$u = $pg->query('SELECT count(*) FROM essens_user')->fetchColumn();
+$m = $pg->query('SELECT count(*) FROM essens_mahlzeiten')->fetchColumn();
+echo "Import ok: $u User, $m Mahlzeiten\n";