Web platform features explorer

Resource size

The decodedBodySize, encodedBodySize, and transferSize properties of the PerformanceResourceTiming API reports the size of resources loaded.

Status

Baseline Newly Available (since 2023-03-27)

This feature is expected to reach Baseline Widely Available status on: 2025-09-27

Browser support

  • Chrome 54 Released on 2016-10-12
  • Chrome Android 54 Released on 2016-10-19
  • Edge 17 Released on 2018-04-30
  • Firefox 45 Released on 2016-03-08
  • Firefox for Android 45 Released on 2016-03-08
  • Safari 16.4 Released on 2023-03-27
  • Safari on iOS 16.4 Released on 2023-03-27