AudioWorklet

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

See full compatibility

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

The AudioWorklet interface of the Web Audio API is used to supply custom audio processing scripts that execute in a separate thread to provide very low latency audio processing.

The worklet's code is run in the AudioWorkletGlobalScope global execution context, using a separate Web Audio thread which is shared by the worklet and other audio nodes.

Access the audio context's instance of AudioWorklet through the BaseAudioContext.audioWorklet property.

Instance properties

This interface also inherits properties defined on its parent interface, Worklet.

port Read only: Returns a MessagePort for custom, asynchronous communication between code in the main thread and the global scope of an audio worklet. This allows for custom messages, such as sending and receiving control data or global settings.

Instance methods

This interface inherits methods from Worklet. The AudioWorklet interface does not define any methods of its own.

Events

AudioWorklet has no events to which it responds.

Examples

See AudioWorkletNode for complete examples of custom audio node creation.

Specifications

Specification
Web Audio API # AudioWorklet

Browser compatibility

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`AudioWorklet`	Chrome – Full support Chrome 66 (Release date: 2018-04-17) footnote Full support	Edge – Full support Edge 79 (Release date: 2020-01-15) footnote Full support	Firefox – Full support Firefox 76 (Release date: 2020-05-05) footnote Full support	Opera – Full support Opera 53 (Release date: 2018-05-10) footnote Full support	Safari – Full support Safari 14.1 (Release date: 2021-04-26) footnote Full support	Chrome Android – Full support Chrome Android 66 (Release date: 2018-04-17) footnote Full support	Firefox for Android – Full support Firefox for Android 79 (Release date: 2020-07-28) footnote Full support	Opera Android – Full support Opera Android 47 (Release date: 2018-07-23) footnote Full support	Safari on iOS – Full support Safari on iOS 14.5 (Release date: 2021-04-26) footnote Full support	Samsung Internet – Full support Samsung Internet 9 (Release date: 2018-09-15) footnote Full support	WebView Android – Full support WebView Android 66 (Release date: 2018-04-17) footnote Full support	WebView on iOS – Full support WebView on iOS 14.5 (Release date: 2021-04-26) footnote Full support
`port` Experimental	Chrome – No support Chrome footnote No support	Edge – No support Edge footnote No support	Firefox – Full support Firefox 138 (Release date: 2025-04-29) footnote Full support	Opera – No support Opera footnote No support	Safari – No support Safari footnote No support	Chrome Android – No support Chrome Android footnote No support	Firefox for Android – Full support Firefox for Android 138 (Release date: 2025-04-29) footnote Full support	Opera Android – No support Opera Android footnote No support	Safari on iOS – No support Safari on iOS footnote No support	Samsung Internet – No support Samsung Internet footnote No support	WebView Android – No support WebView Android footnote No support	WebView on iOS – No support WebView on iOS footnote No support

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

Full support: Full support
No support: No support
: Experimental. Expect behavior to change in the future.