Free health check
What your app is showing the world.
Paste your live app's address, or its public GitHub repository. In under a minute we check what any visitor's browser can see: security headers, the certificate, secret keys and source maps in your public code, and files that should never be public. Free, no sign-in, and we never touch your data.
The free health check opens with the private beta in January 2027.
Until then, the proof page shows every result we have, with its date.