RTCTransformEvent: transformer property

Baseline 2025
Newly available

Since October 2025, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.

The read-only transformer property of the RTCTransformEvent interface returns the RTCRtpScriptTransformer associated with the event.

The property exposes the WebRTC sender or receiver pipeline as a readable and writable stream of encoded media frames, which a WebRTC Encoded Transform can insert itself into in order to modify frames.

Value

A RTCRtpScriptTransformer.

Specifications

Specification
WebRTC Encoded Transform
# dom-rtctransformevent-transformer

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
transformer
Chrome – Full support
Chrome 141 (Release date: 2025-09-30)
footnote Full support
Edge – Full support
Edge 141 (Release date: 2025-10-03)
footnote Full support
Firefox – Full support
Firefox 117 (Release date: 2023-08-29)
footnote Full support
Opera – Full support
Opera 125 (Release date: 2025-12-04)
footnote Full support
Safari – Full support
Safari 15.4 (Release date: 2022-03-14)
footnote Full support
Chrome Android – Full support
Chrome Android 141 (Release date: 2025-09-30)
footnote Full support
Firefox for Android – Full support
Firefox for Android 117 (Release date: 2023-08-29)
footnote Full support
Opera Android – Full support
Opera Android 93 (Release date: 2025-11-25)
footnote Full support
Safari on iOS – Full support
Safari on iOS 15.4 (Release date: 2022-03-14)
footnote Full support
Samsung Internet – No support
Samsung Internet
footnote No support
WebView Android – Full support
WebView Android 141 (Release date: 2025-09-30)
footnote Full support
WebView on iOS – Full support
WebView on iOS 15.4 (Release date: 2022-03-14)
footnote Full support

Legend

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

Full support
Full support
No support
No support

See also