The Window.crypto read-only property returns the Crypto object associated to the global object. This object allows web pages access to certain cryptographic related services.

Syntax

var cryptoObj = window.crypto || window.msCrypto; // for IE 11

Example

Using the Window.crypto property to access the getRandomValues() method.

JavaScript

genRandomNumbers = function getRandomNumbers() {
  var array = new Uint32Array(10);
  window.crypto.getRandomValues(array);
 
  var randText = document.getElementById("myRandText");
  randText.innerHTML = "The random numbers are: "
  for (var i = 0; i < array.length; i++) {
    randText.innerHTML += array[i] + " ";
  }
}

HTML

<p id="myRandText">The random numbers are: </p>
<button type="button" onClick='genRandomNumbers()'>Generate 10 random numbers</button>

Result

Specifications

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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Edge Opera Safari
Basic support 44 (Yes) (Yes) (Yes) 11 ms 20 19 (Yes)
Feature Chrome for Android Edge Firefox Mobile Firefox OS IE Phone Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

See also

Document Tags and Contributors

 Last updated by: xrtariq2594,