Back to GPU Tool
Learn About ASP Bypass
WEBGL_compressed_texture_astc
WebGL Extension
Both
Fingerprinting Signal
Test Your Browser
What is WEBGL_compressed_texture_astc?
The WEBGL_compressed_texture_astc extension is part of the WebGL API and exposes ASTC (Adaptive Scalable Texture Compression) compressed texture formats. Provides 28 constants for different block sizes and getSupportedProfiles() method. Typically available on Mali ARM GPUs, Intel GPUs, and NVIDIA Tegra. Available in both WebGL1 and WebGL2.
Read MDN DocumentationBrowser 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.
Related WebGL Extensions
Test Your Complete GPU Fingerprint
Discover all WebGL extensions, WebGPU features, and GPU information exposed by your browser.
Run GPU Fingerprint Test