Web/API/Crypto/subtle

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

The Crypto.subtle read-only property returns a SubtleCrypto which can then be used to perform low-level cryptographic operations.

Syntax

var crypto = crypto.subtle;

Value

A SubtleCrypto object you can use to interact with the Web Crypto API's low-level cryptography features.

Specifications

Specification	Status	Comment
Web Cryptography APIThe definition of 'Crypto.subtle' in that specification.	Recommendation	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`subtle` Experimental'	Chrome Full support 37	Edge Full support 12	Firefox Full support 34 Full support 34 No support 32 — 34 Disabled' Disabled' From version 32 until version 34 (exclusive): this feature is behind the `dom.webcrypto.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	IE Partial support 11	Opera Full support 24	Safari Full support 10.1 Full support 10.1 Full support 7 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	WebView Android Full support 37	Chrome Android Full support 37	Firefox Android Full support 34 Full support 34 No support 32 — 34 Disabled' Disabled' From version 32 until version 34 (exclusive): this feature is behind the `dom.webcrypto.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android Full support 24	Safari iOS Full support 10.3 Full support 10.3 Full support 7 Prefixed' Prefixed' Implemented with the vendor prefix: webkit	Samsung Internet Android Full support 3.0
Secure context required	Chrome Full support 60	Edge Full support 79	Firefox Full support 75	IE No support No	Opera Full support 47	Safari No support No	WebView Android Full support 60	Chrome Android Full support 60	Firefox Android No support No	Opera Android Full support 47	Safari iOS No support No	Samsung Internet Android Full support 8.0

Legend

Full support: Full support
Partial support: Partial support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.': User must explicitly enable this feature.
Requires a vendor prefix or different name for use.': Requires a vendor prefix or different name for use.