WebAuthn / Passkey Demo
Call WebAuthn API in real-time on this page's domain, create and use a Passkey, parse and display browser-returned clientDataJSON, authenticatorData (flags / signCount), attestation format and credential public key (COSE). Requires WebAuthn-capable browser and authenticator (platform fingerprint / Face ID / security key). Pure frontend, data never uploaded.
Complete Server-Side Flow
This page only demonstrates browser-side data structure. For a complete registration/login loop with server-side verification, see Mock WebAuthn RP.