Client Hints: DPR, Width, Viewport-Width

- OTHER

DPR, Width, and Viewport-Width hints enable proactive content negotiation between client and server, enabling automated delivery of optimized assets - e.g. auto-negotiating image DPR resolution.

Chrome

  1. 4 - 45: Not supported
  2. 46 - 121: Supported
  3. 122: Supported
  4. 123 - 125: Supported

Edge

  1. 12 - 18: Not supported
  2. 79 - 121: Supported
  3. 122: Supported

Safari

  1. 3.1 - 17.2: Not supported
  2. 17.3: Not supported
  3. 17.4 - TP: Not supported

Firefox

  1. 2 - 122: Not supported
  2. 123: Not supported
  3. 124 - 126: Not supported

Opera

  1. 9 - 32: Not supported
  2. 33 - 105: Supported
  3. 106: Supported

IE

  1. 5.5 - 10: Not supported
  2. 11: Not supported

Chrome for Android

  1. 122: Supported

Safari on iOS

  1. 3.2 - 17.2: Not supported
  2. 17.3: Not supported
  3. 17.4: Not supported

Samsung Internet

  1. 4: Not supported
  2. 5 - 22: Supported
  3. 23: Supported

Opera Mini

  1. all: Not supported

Opera Mobile

  1. 10 - 12.1: Not supported
  2. 73: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.4.4: Not supported
  2. 122: Supported

Firefox for Android

  1. 123: Not supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Not supported
  2. 3: Not supported
Resources:
WebKit Bug 145380 - Add Content-DPR header support
Mozilla Bug 935216 - Implement Client-Hints HTTP header
Automating resource selection with Client Hints