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5. WEBGL\_compressed\_texture\_etc1
 
   [  Back to GPU Tool ](https://scrapfly.io/web-scraping-tools/gpu-fingerprint)  # WEBGL\_compressed\_texture\_etc1

WebGL Extension

 

 

   Both    Fingerprinting Signal  

 [  Test Your Browser ](https://scrapfly.io/web-scraping-tools/gpu-fingerprint) 

 

  ### What is WEBGL\_compressed\_texture\_etc1?

 

 The WEBGL\_compressed\_texture\_etc1 extension is part of the WebGL API and exposes the ETC1 compressed texture format. Provides COMPRESSED\_RGB\_ETC1\_WEBGL constant for compressing 24-bit RGB data with no alpha. Note: NOT supported with compressedTexSubImage2D(). Available in both WebGL1 and WebGL2.

 [  Read MDN Documentation  ](https://developer.mozilla.org/en-US/docs/Web/API/WEBGL_compressed_texture_etc1) 

  ### Browser Support

 

  Checking Extension Support 

 This extension is part of the **Both** specification. Browser support varies based on: - Graphics card model and capabilities
- GPU driver version
- Browser version and vendor
- Operating system
 
 

 

 

  ### Usage in Web Scraping & Anti-Bot Bypass

 

 Modern anti-bot systems verify WebGL extensions to detect automated browsers. Mismatches between GPU hardware and available extensions are strong bot signals.

##### What Anti-Bot Systems Check:

- **Extension availability:** Does the reported GPU support these extensions?
- **Extension combinations:** Are the extensions typical for this GPU model?
- **Consistency checks:** Do reported extensions match other GPU signals?
- **Missing extensions:** Are expected extensions for this GPU absent?
 
  Scrapfly's Anti-Scraping Protection (ASP) 

 Scrapfly automatically manages **WebGL fingerprint consistency**, ensuring all extensions match the emulated GPU profile. This prevents detection by anti-bot systems that verify WebGL data. 

 

 [  Learn About ASP Bypass ](https://scrapfly.io/docs/scrape-api/anti-scraping-protection) 

  ### Related WebGL Extensions

 

 [ EXT_color_buffer_half_float 

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 The EXT_float_blend extension is part of the WebGL API and allows blending and draw buffers with 32-... 

 ](https://scrapfly.io/web-scraping-tools/gpu-fingerprint/webgl/ext-float-blend) [ EXT_texture_compression_bptc 

 The EXT_texture_compression_bptc extension is part of the WebGL API and exposes 4 BPTC compressed te... 

 ](https://scrapfly.io/web-scraping-tools/gpu-fingerprint/webgl/ext-texture-compression-bptc) [ EXT_texture_compression_rgtc 

 The EXT_texture_compression_rgtc extension is part of the WebGL API and exposes 4 RGTC compressed te... 

 ](https://scrapfly.io/web-scraping-tools/gpu-fingerprint/webgl/ext-texture-compression-rgtc) [ EXT_texture_filter_anisotropic 

 The EXT_texture_filter_anisotropic extension is part of the WebGL API and exposes two constants for ... 

 ](https://scrapfly.io/web-scraping-tools/gpu-fingerprint/webgl/ext-texture-filter-anisotropic) 

 

  ### Test Your Complete GPU Fingerprint

 Discover all WebGL extensions, WebGPU features, and GPU information exposed by your browser.

 [  Run GPU Fingerprint Test ](https://scrapfly.io/web-scraping-tools/gpu-fingerprint)