The CryptoKey interface represents a cryptographic key derived from a specific key algorithm.

A CryptoKey object can be obtained using SubtleCrypto.generateKey(), SubtleCrypto.deriveKey() or SubtleCrypto.importKey()


This interface doesn't inherit any property.

Returns an enumerated value representing the type of the key, a secret key (for symmetric algorithm), a public or a private key (for an asymmetric algorithm)
Returns a Boolean indicating if the raw information may be exported to the application or not.
Returns an opaque object representing a particular cipher the key has to be used with.
Returns an array of enumerated values indicating what the key can be used for.


This interface neither inherits, nor implements, any method.


Specification Status Comment
Web Cryptography API
The definition of 'CryptoKey' in that specification.
Recommendation Initial definition.

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support37 Yes34 No ? No
type371234 No ? No
extractable371234 No ? No
algorithm371234 No ? No
usages371234 No ? No
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support3737 Yes34 ? No Yes
type3737 Yes34 ? No Yes
extractable3737 Yes34 ? No Yes
algorithm3737 Yes34 ? No Yes
usages3737 Yes34 ? No Yes

See also

Document Tags and Contributors

Contributors to this page: fscholz, erikadoyle, teoli
Last updated by: fscholz,