Web authentication easy public key access

The getAuthenticatorData(), getPublicKey(), and getPublicKeyAlgorithm() methods of AuthenticatorAttestationResponse access credential data inside attestationObject without the need to parse it.

Baseline Status: Achieved Widely Available on Apr 24, 2026 (Cross-browser Newly Available since Oct 24, 2023).

Desktop Browser Engine Support

Google Chrome

85

Supported

Mozilla Firefox

119

Supported

Apple Safari

16

Supported

Microsoft Edge

85

Supported

Mobile Browser Engine Support

Chrome Android

85

Firefox Android

119

Safari iOS

16

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.AuthenticatorAttestationResponse.getAuthenticatorData ↗ api.AuthenticatorAttestationResponse.getPublicKey ↗ api.AuthenticatorAttestationResponse.getPublicKey.algorithm_eddsa ↗ api.AuthenticatorAttestationResponse.getPublicKey.algorithm_es256 ↗ api.AuthenticatorAttestationResponse.getPublicKey.algorithm_rs256 ↗ api.AuthenticatorAttestationResponse.getPublicKeyAlgorithm ↗