ProfilerLimited availability

The Profiler API records data about the execution of a page, which you can send to a server for later analysis. Also known as self-profiling.

Not yet supported in all major browsers — check the table and provide a fallback.

Browser support

DesktopChrome

1–93Not supported

94+Supportedsince Sep 21, 2021

Current: 155

Edge

12–93Not supported

94+Supportedsince Sep 24, 2021

Current: 154

Firefox

✕Not supportedup to 157

Current: 157

Safari

✕Not supportedup to 27

Current: 27

MobileChrome Android

18–93Not supported

94+Supportedsince Sep 21, 2021

Current: 155

Firefox Android

✕Not supportedup to 157

Current: 157

Safari iOS

✕Not supportedup to 27

Current: 27

Not supported in Firefox, Safari, Firefox Android, Safari iOS. Use feature detection below and provide a fallback (or a polyfill) for those browsers.

Full syntax and examples are on MDN: Profiler.

JS · check before using

if ("Profiler" in globalThis) {
  // Profiler is available
} else {
  // load a polyfill or use a fallback
}

Support for each part of the feature (5). The overall table above shows when the whole feature works.

Sub-feature	Chrome	Edge	Firefox	Safari	Chrome Android	Firefox Android	Safari iOS
Profiler	94	94	✕	✕	94	✕	✕
Profiler.Profiler	94	94	✕	✕	94	✕	✕
Profiler.sampleInterval	94	94	✕	✕	94	✕	✕
Profiler.stop	94	94	✕	✕	94	✕	✕
Profiler.stopped	94	94	✕	✕	94	✕	✕