Crypto: randomUUID() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since March 2022.

See full compatibility

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

Note: This feature is available in Web Workers.

The randomUUID() method of the Crypto interface is used to generate a v4 UUID using a cryptographically secure random number generator.

Syntax

randomUUID()

Parameters

None.

Return value

A string containing a randomly generated, 36 character long v4 UUID.

Examples

/* Assuming that self.crypto.randomUUID() is available */

let uuid = self.crypto.randomUUID();
console.log(uuid); // for example "36b8f84d-df4e-4d49-b662-bcde71a8764f"

Specifications

Specification
Web Cryptography Level 2 # Crypto-method-randomUUID

Browser compatibility

	desktop					mobile							server
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS	Bun	Deno	Node.js
`randomUUID()`	Chrome – Full support Chrome 92 (Release date: 2021-07-20) footnote Full support	Edge – Full support Edge 92 (Release date: 2021-07-22) footnote Full support	Firefox – Full support Firefox 95 (Release date: 2021-12-07) footnote Full support	Opera – Full support Opera 78 (Release date: 2021-08-03) footnote Full support	Safari – Full support Safari 15.4 (Release date: 2022-03-14) footnote Full support	Chrome Android – Full support Chrome Android 92 (Release date: 2021-07-20) footnote Full support	Firefox for Android – Full support Firefox for Android 95 (Release date: 2021-12-07) footnote Full support	Opera Android – Full support Opera Android 65 (Release date: 2021-10-20) footnote Full support	Safari on iOS – Full support Safari on iOS 15.4 (Release date: 2022-03-14) footnote Full support	Samsung Internet – Full support Samsung Internet 16 (Release date: 2021-11-25) footnote Full support	WebView Android – Full support WebView Android 92 (Release date: 2021-07-20) footnote Full support	WebView on iOS – Full support WebView on iOS 15.4 (Release date: 2022-03-14) footnote Full support	Bun – Full support Bun 1 (Release date: 2023-09-08) footnote Full support	Deno – Full support Deno 1.11 (Release date: 2021-06-08) footnote Full support	Node.js – Full support Node.js 16.7 (Release date: 2021-08-17) footnote footnote Since 14.17.0 and 15.6.0, a similar method is available via the `crypto` module.

Tip: you can click/tap on a cell for more information.

Full support: Full support
: See implementation notes.