Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

The PublicKeyCredential interface provides information about a public key / private key pair, which is a credential for logging in to a service using an un-phishable and data-breach resistant asymmetric key pair instead of a password. It inherits from Credential, and is part of the Web Authentication API extension to the Credential Management API.

Credential PublicKeyCredential

Note: This API is restricted to top-level contexts. Use from within an <iframe> element will not have any effect.

Instance properties

PublicKeyCredential.authenticatorAttachment Read only

A string that indicates the mechanism by which the WebAuthn implementation is attached to the authenticator at the time the associated navigator.credentials.create() or navigator.credentials.get() call completes. Read only

Inherited from Credential and overridden to be the base64url encoding of PublicKeyCredential.rawId.

PublicKeyCredential.rawId Read only

An ArrayBuffer that holds the globally unique identifier for this PublicKeyCredential. This identifier can be used to look up credentials for future calls to navigator.credentials.get().

PublicKeyCredential.response Read only

An instance of an AuthenticatorResponse object. It is either of type AuthenticatorAttestationResponse if the PublicKeyCredential was the results of a navigator.credentials.create() call, or of type AuthenticatorAssertionResponse if the PublicKeyCredential was the result of a navigator.credentials.get() call.

PublicKeyCredential.type Read only

Inherited from Credential. Always set to public-key for PublicKeyCredential instances.

Static methods


Returns a Promise which resolves to true if conditional mediation is available.


Returns a Promise which resolves to true if an authenticator bound to the platform is capable of verifying the user.

PublicKeyCredential.parseCreationOptionsFromJSON() Experimental

Convenience method for deserializing server-sent credential registration data when registering a user with credentials.

PublicKeyCredential.parseRequestOptionsFromJSON() Experimental

Convenience method for deserializing server-sent credential request data when authenticating a (registered) user.

Instance methods


If any extensions were requested, this method will return the results of processing those extensions.

PublicKeyCredential.toJSON() Experimental

Convenience method for creating a JSON string representation of a PublicKeyCredential for sending to the server when registering a user with credentials and authenticating a registered user.


Creating a new instance of PublicKeyCredential

Here, we use navigator.credentials.create() to generate a new credential.

const createCredentialOptions = {
  challenge: new Uint8Array([
    21, 31, 105 /* 29 more random bytes generated by the server */,
  rp: {
    name: "Example CORP",
    id: "",
  user: {
    id: new Uint8Array(16),
    name: "",
    displayName: "Carina Anand",
  pubKeyCredParams: [
      type: "public-key",
      alg: -7,

  .create({ createCredentialOptions })
  .then((newCredentialInfo) => {
    const response = newCredentialInfo.response;
    const clientExtensionsResults =
  .catch((err) => {

Getting an existing instance of PublicKeyCredential

Here, we fetch an existing credential from an authenticator, using navigator.credentials.get().

const requestCredentialOptions = {
  challenge: new Uint8Array([
    /* bytes sent from the server */

  .get({ requestCredentialOptions })
  .then((credentialInfoAssertion) => {
    // send assertion response back to the server
    // to proceed with the control of the credential
  .catch((err) => {


Web Authentication: An API for accessing Public Key Credentials - Level 3
# iface-pkcredential

Browser compatibility

BCD tables only load in the browser

See also