diff --git a/scripts/split-names-in-users.js b/scripts/split-names-in-users.js
new file mode 100644
index 0000000..cb698bc
--- /dev/null
+++ b/scripts/split-names-in-users.js
@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+// Script: split-names-in-users.js
+// Splittet das Feld "name" in firstName und lastName für alle User in users.json, falls noch nicht vorhanden.
+// Backup wird automatisch angelegt.
+
+const fs = require('fs')
+const path = require('path')
+
+const usersPath = path.join(__dirname, '../server/data/users.json')
+const backupPath = usersPath + '.bak.' + new Date().toISOString().replace(/[:.]/g, '-')
+
+function extractNames(name) {
+  if (!name || typeof name !== 'string') return { firstName: '', lastName: '' }
+  const parts = name.trim().split(/\s+/)
+  if (parts.length === 1) return { firstName: parts[0], lastName: '' }
+  return { firstName: parts[0], lastName: parts.slice(1).join(' ') }
+}
+
+function main() {
+  if (!fs.existsSync(usersPath)) {
+    console.error('users.json nicht gefunden:', usersPath)
+    process.exit(1)
+  }
+  const users = JSON.parse(fs.readFileSync(usersPath, 'utf8'))
+  let changed = false
+
+  for (const user of users) {
+    if ((!user.firstName || !user.lastName) && user.name) {
+      const { firstName, lastName } = extractNames(user.name)
+      if (!user.firstName) user.firstName = firstName
+      if (!user.lastName) user.lastName = lastName
+      changed = true
+    }
+  }
+
+  if (changed) {
+    fs.copyFileSync(usersPath, backupPath)
+    fs.writeFileSync(usersPath, JSON.stringify(users, null, 2))
+    console.log('Felder firstName/lastName ergänzt. Backup:', backupPath)
+  } else {
+    console.log('Keine Änderungen nötig. Alle Namen bereits gesplittet.')
+  }
+}
+
+main()