This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

This is the base interface of AuthenticatorAttestationResponse and AuthenticatorAssertionResponse, which are part of the PublicKeyCredential.response resulting from create() and get(), respectively. It contains the AuthenticatorResponse.clientDataJSON that is inherited by those interfaces. 


A JSON formatted string in an ArrayBuffer, representing the client data that was used during the create() or get() call.




Specification Status Comment
Web Authentication: An API for accessing Public Key Credentials Level 1 Candidate Recommendation Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support651 2 ?601 ? ? ?
clientDataJSON651 2 ?601 ? ? ?
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support ? ? ? ? ? ? ?
clientDataJSON ? ? ? ? ? ? ?

1. Only support USB U2F tokens

2. From version 65: this feature is behind the Web Authentication API preference (needs to be set to true). To change preferences in Chrome, visit chrome://flags.

Document Tags and Contributors

Contributors to this page: ExE-Boss, apowers313
Last updated by: ExE-Boss,