The CryptoKey.extractable read-only property that indicates if the raw material key can be extracted, for example for archiving it.


result = key.extractable

Return value

  • result is a Boolean indicating if the key can be extracted.


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

Browser compatibility

Update compatibility data on GitHub
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 37Edge Full support 12Firefox Full support 34IE No support NoOpera ? Safari No support NoWebView Android Full support 37Chrome Android Full support 37Edge Mobile Full support YesFirefox Android Full support 34Opera Android ? Safari iOS No support NoSamsung Internet Android Full support Yes


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Compatibility unknown  
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See also

Document Tags and Contributors

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