Web features explorer

<img sizes="auto" loading="lazy">

Limited availability

The sizes="auto" attribute for the <img> HTML element sets the layout size for the image based on the computed layout size when choosing a source from the srcset. This attribute only applies to images with the loading="lazy" attribute.

Browser support

  • Chrome 126 Released on 2024-06-11
  • Chrome Android 126 Released on 2024-06-11
  • Edge 126 Released on 2024-06-13
  • Firefox 150 Released on 2026-04-21
  • Firefox for Android 150 Released on 2026-04-21
  • Safari Not supported Bugs: 253143
  • Safari on iOS Not supported Bugs: 253143

Baseline availability blocked since April 2026 by Safari (3 months)

👍
27

Need this feature?
Leave a 👍 on the feedback issue
Don't forget to also leave a comment explaining your specific use case.

MDN documentation

Specifications

Usage (according to Chrome Platform Status)

~0.932% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

Surveys

View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist