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WebAuthn Debugger

Parse and analyze WebAuthn/Passkey authentication data

clientDataJSON (Base64URL)

authenticatorData (Base64URL)

Input Format

  • • Both fields accept Base64URL-encoded data
  • • You can parse either field independently
  • • Get these values from navigator.credentials.create() or .get()

Paste WebAuthn data and click "Parse"

Learn More

About WebAuthn/Passkeys

  • •Web Authentication API (WebAuthn) enables passwordless authentication
  • •clientDataJSON contains challenge, origin, and ceremony type
  • •authenticatorData contains RP ID hash, flags, and credential data
  • •COSE (CBOR Object Signing and Encryption) format for public keys

WebAuthn in IAM

  • •Passkeys – FIDO2 passwordless authentication
  • •MFA – Hardware security key verification
  • •Platform Auth – Fingerprint/Face ID login
  • •Phishing Resistant – Origin-bound credentials