web-feature: WEBGL_compressed_texture_s3tc WebGL extension

The WEBGL_compressed_texture_s3tc extension for WebGL 1.0 and 2.0 contexts adds S3TC compressed texture formats to compressedTexImage2D() and compressedTexSubImage2D().

WKWebView

macOS

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iOS

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Android WebView

Android

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WebView2

Windows

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Chrome Browser

Android

*

Safari Browser

iOS

*

Notes

Support data provided by: BCD logo

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This feature was last updated on November 10, 2025.