Preflight before a critical sign-in
See which passkey providers may overlap.
Check extension coexistence, browser capability, and your way back in—without reading a password, passkey, page, or form.
You’re offline. The check still works; nothing needs the network.
Local inspection sheet
Your browser profile
Checking this browser…
Looking only at capability and extension metadata.
Looking only at capability and extension metadata.
01 / Providers
Confirm every enabled provider
Detected matches are selected. Add anything the browser could not reveal.
02 / Recovery
Mark a route you can use today
Only check routes you have actually verified. These notes stay in extension storage.
03 / Before you rely on a passkey
Recovery-first checklist
What this check can—and cannot—know
Documented browser APIs can report WebAuthn capability and, with your permission, extension names and enabled state. They cannot prove a passkey will work on a particular site. Browser and operating-system credential providers may not be enumerable. This tool never creates a credential or starts a real authentication ceremony.