The WEBGL_debug_renderer_info extension is part of the WebGL API and exposes two constants with information about the graphics driver for debugging purposes.

Depending on the privacy settings of the browser, this extension might only be available to privileged contexts. Generally, the graphics driver information should only be used in edge cases to optimize your WebGL content or to debug GPU problems. The WebGLRenderingContext.getParameter() method can help you to detect which features are supported and the failIfMajorPerformanceCaveat context attribute lets you control if a context should be returned at all, if the performance would be dramatically slow.

WebGL extensions are available using the WebGLRenderingContext.getExtension() method. For more information, see also Using Extensions in the WebGL tutorial.

Availability: Depending on the privacy settings of the browser, this extension might only be available to privileged contexts.

This extension is available to both, WebGL1 and WebGL2 contexts.


Vendor string of the graphics driver.
Renderer string of the graphics driver.


With the help of this extension, privileged contexts are able to retrieve debugging information about about the user's graphic driver:

var canvas = document.getElementById("canvas");
var gl = canvas.getContext("webgl");

var debugInfo = gl.getExtension('WEBGL_debug_renderer_info');
var vendor = gl.getParameter(debugInfo.UNMASKED_VENDOR_WEBGL);
var renderer = gl.getParameter(debugInfo.UNMASKED_RENDERER_WEBGL);



Specification Status Comment
The definition of 'WEBGL_debug_renderer_info' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support ? 19 (19) [1] ? ? ?
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support ? ? 19.0 (19) [1] ? ? ?

[1] Starting with version 42, this extension is enabled by default to web content in Aurora and Nightly channels. See also the preferences webgl.enable-debug-renderer-info and webgl.enable-privileged-extensions in about:config.

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,