Back to GPU Tool

OES_texture_half_float

WebGL Extension

WebGL1 Fingerprinting Signal
Test Your Browser

What is OES_texture_half_float?

The OES_texture_half_float extension is part of the WebGL API and adds texture formats with 16-bit (half float) and 32-bit floating-point components. The type parameter of texImage2D() and texSubImage2D() accepts ext.HALF_FLOAT_OES constant. Linear filtering is not allowed unless OES_texture_half_float_linear extension is also enabled. This extension implicitly enables EXT_color_buffer_half_float if supported. Available in WebGL1 only; in WebGL2, the constant is gl.HALF_FLOAT.

Read MDN Documentation

Browser Support

Checking Extension Support
This extension is part of the WebGL1 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

Related WebGL Extensions

ANGLE_instanced_arrays
The ANGLE_instanced_arrays extension is part of the WebGL API and allows to draw the same object or ...
EXT_blend_minmax
The EXT_blend_minmax extension is part of the WebGL API and extends blending capabilities by adding ...
EXT_disjoint_timer_query
The EXT_disjoint_timer_query extension is part of the WebGL API and provides a way to measure the du...
EXT_frag_depth
The EXT_frag_depth extension is part of the WebGL API and enables setting a depth value of a fragmen...
EXT_shader_texture_lod
The EXT_shader_texture_lod extension is part of the WebGL API and adds texture functions to GLSL sha...

Test Your Complete GPU Fingerprint

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

Run GPU Fingerprint Test