On the standards track: Yes
Is Experimental: No
Is Deprecated: No
In Chrome version 81 on 2020-04-07 Note: Windows and macOS since Chrome 81. ChromeOS since Chrome 91. Linux offers no universal badging API on the operating system level.
In Chrome Android version 81 on 2020-04-07
In Edge version 81 on 2020-04-13 Note: Windows and macOS since Edge 81. ChromeOS since Edge 91. Linux offers no universal badging API on the operating system level.
Not in Firefox
Not in Firefox for Android
Not in Internet Explorer
Not in Node.js
In Quest Browser version 9.0 on undefined
Not in Opera
In Opera Android version 58 on 2020-05-13
In Safari version 17 on 2023-09-18 Note: Badging is supported for installed web apps on macOS Sonoma and higher.
In Safari on iOS version 16.4 on 2023-03-27 Note: Badging is supported for web apps saved to the home screen.
In Samsung Internet version 13.0 on 2020-12-02
In WebView Android version 81 on 2020-04-07
Not in WebView on iOS Note: Badging is supported for web apps saved to the home screen.