The Crypto interface represents basic cryptography features available in the current context. It allows access to a cryptographically strong random number generator and to cryptographic primitives.

An object with this interface is available on Web context via the Window.crypto property.


This interface implements properties defined on RandomSource.

Crypto.subtle Read only
Returns a SubtleCrypto object providing access to common cryptographic primitives, like hashing, signing, encryption or decryption.


This interface implements methods defined on RandomSource.

Fills the passed TypedArray with cryptographically sound random values.


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

See Also


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API Interface Reference Référence Web Crypto API