HTTP Client Hints: Save-Data

The “Save-Data” header field is a boolean that, in requests, indicates client’s explicit opt-in for reduced data usage, due to high transfer costs, slow connection speeds, or other reasons. When communicated to origins, it allows them to deliver alternate content honoring such preference - e.g. smaller image and video resources, alternate "light mode" markup, etc.



Editor's draft

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 49
  • Chrome for Android release 49
  • Chrome for iOS release 49
  • Android WebView release 49
  • Opera release 35
  • Opera for Android release 35

Consensus & Standardization

  • No public signals
  • No public signals
  • No public signals
  • Positive


Last updated on 2017-06-14