Web platform features explorer - Zstandard compression

Zstandard or zstd is a fast lossless compression algorithm. When used as a content encoding, it is often faster and offers better compression than brotli.

Status

Baseline Newly Available (since 2026-02-11)

This feature is expected to reach Baseline Widely Available status on: 2028-08-11

MDN documentation

Content-Encoding header

Specifications

Zstandard Compression and the 'application/zstd' Media Type, from Applications and Real-Time Area (IETF).

Browser support (view on caniuse.com)

Chrome 123 Released on 2024-03-19
Chrome Android 123 Released on 2024-03-19
Edge 123 Released on 2024-03-22
Firefox 126 Released on 2024-05-14
Firefox for Android 126 Released on 2024-05-14
Safari 26.3 Released on 2026-02-11
Safari on iOS 26.3 Released on 2026-02-11

Usage (according to Chrome Platform Status)

~42.638% of page loads. More data at chromestatus.com.

Web Platform Tests (WPT)

View the latest WPT test results for this feature

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