coderef

WEBGL_compressed_texture_etc1 WebGL extensionBaseline · Widely available

The WEBGL_compressed_texture_etc1 extension for WebGL 1.0 and 2.0 contexts adds the ETC1 compressed texture format to compressedTexImage2D() and compressedTexSubImage2D().

Supported in all major browsers for at least 30 months — safe to use without fallbacks. Baseline since Mar 24, 2020. Widely available since Sep 24, 2022.

How to use ↓Compare browsers

Browser support

DesktopChrome
1–48Not supported
49+Supportedsince Mar 2, 2016
Current: 155
Edge
12–18Not supported
79+Supportedsince Jan 15, 2020
Current: 154
Firefox
1–54Not supported
55+Supportedsince Aug 8, 2017
Current: 157
Safari
1–13Not supported
13.1+Supportedsince Mar 24, 2020
Current: 27
MobileChrome Android
18–48Not supported
49+Supportedsince Mar 9, 2016
Current: 155
Firefox Android
4–29Not supported
30+Supportedsince Jun 10, 2014
Current: 157
Safari iOS
1–13Not supported
13.4+Supportedsince Mar 24, 2020
Current: 27

How to use

This feature is Baseline widely available — use it freely, no fallback needed.

Example

Full syntax and examples are on MDN: WEBGL compressed texture etc1.

Feature detection

JS · check before using
if ("WEBGL_compressed_texture_etc1" in globalThis) {
  // WEBGL_compressed_texture_etc1 is available
} else {
  // load a polyfill or use a fallback
}

Documentation (MDN)

Specification