🎮 WebGL Test — WebGL 1/2, GPU Limits & Render Check

Browser Graphics Capability Lab

Free WebGL Test for WebGL 1/2 Support, GPU Limits, and Rendering

Check WebGL 1 and WebGL 2 support, context attributes, renderer information when exposed, extension counts, shader precision, texture and buffer limits, and a real draw/readback test without installing software.

100% freeNo emailNo phone numberNo signupLocal browser processing

Interactive webgl test

Free WebGL Test for WebGL 1/2 Support, GPU Limits, and Rendering

Use the live controls below, then review the explanation, limits, checklist, and comparison guidance before acting on the result.

—WebGL 1

—WebGL 2

—Draw/readback

—Extensions

Renderer and context

Run the scan to inspect the current browser graphics context.

Filter extensions

No extension list yet.

Capability	WebGL 1	WebGL 2	Meaning

Run the WebGL scan to create a compatibility report.

12 practical capabilities

Built for an actual decision, not a single output

WebGL 1 and WebGL 2 detection

Real context creation test

GPU vendor and renderer when exposed

Extension inventory with search

Maximum texture-size checks

Renderbuffer and viewport limits

Texture-unit and vertex-attribute limits

Shader precision audit

Antialias and context-attribute report

Triangle render plus pixel readback

Short render-loop timing proxy

Copy and download compatibility report

Practical guide

What a WebGL test can tell you

WebGL is the browser graphics API built on OpenGL ES concepts. A successful context creation confirms that the browser, graphics stack, policy settings, and available GPU path can expose WebGL to the page. WebGL 2 adds features and limits beyond WebGL 1, but support alone does not guarantee a particular application's performance.

Hardware and driver details may be intentionally masked for privacy. The WEBGL_debug_renderer_info extension can expose an unmasked vendor and renderer on some systems, while other browsers return generic information. This page reports the value only when the browser provides it.

The draw test compiles shaders, creates a buffer, draws a triangle, and reads a center pixel. The short loop measures JavaScript-to-WebGL work in this page and should be treated as a lightweight compatibility proxy rather than a standardized GPU benchmark.

Worked example

Worked example: troubleshooting a 3D web app

If a site requires WebGL 2, first confirm WebGL 2 context creation. Then review maximum texture size, extension availability, shader precision, and the draw/readback check. A failed render with a valid context points to a different problem than a browser that cannot create the required context at all.

Six-minute microlearning path

Understand the result before you trust it

WebGL 1 and WebGL 2 are different contexts

A browser may support both, one, or neither depending on policy and graphics capability.

Mark learned

Limits are implementation-specific

Maximum texture size and other limits can vary across GPUs, drivers, and browser configurations.

Mark learned

Extensions add optional capabilities

Do not assume an extension exists just because another device exposes it.

Mark learned

Renderer strings may be masked

Privacy protections can hide or generalize hardware identifiers.

Mark learned

A draw check tests more than detection

Compiling shaders and reading pixels verifies a usable render path.

Mark learned

A loop timing is not a standard benchmark

Real applications depend on scene complexity, shaders, memory traffic, and display behavior.

Mark learned

Reference table

Key checks, formulas, and limitations

Check	Typical API	Meaning	Caution
WebGL 1	canvas.getContext('webgl')	Baseline WebGL context	Can be blocked by browser policy
WebGL 2	canvas.getContext('webgl2')	Newer feature set	Not identical to desktop OpenGL
Max texture size	MAX_TEXTURE_SIZE	Largest 2D texture dimension	Not a performance score
Extensions	getSupportedExtensions()	Optional capabilities	Availability varies
Render check	Shader + draw + readPixels	Usable pipeline test	Not a full stress test

Knowledge challenge

Three quick checks

Can a browser support WebGL 1 but not WebGL 2?

Does MAX_TEXTURE_SIZE directly measure GPU speed?

Why can the renderer name be generic?

Online checklist

Quality-control checklist

I checked both WebGL 1 and WebGL 2.I reviewed the actual draw/readback result.I checked required extensions for my application.I compared texture and renderbuffer limits with app requirements.I understand renderer details may be masked.I avoided treating the short loop as a standardized benchmark.I tested in the browser that matters for my users.I saved the compatibility report for comparison.

Local result history

Recent saved summaries on this device

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Frequently asked questions

Webgl Test: FAQ

Is this WebGL test free?+

Yes. It runs in your browser without signup, email, phone number, or payment.

What is the difference between WebGL 1 and WebGL 2?+

WebGL 2 exposes a newer graphics feature set and additional capabilities. Applications should test the exact context and features they require.

Why is my GPU name hidden?+

Browsers can mask or generalize renderer information for privacy and security reasons.

Does a successful WebGL test guarantee a game will run well?+

No. A successful compatibility check confirms the API path, while application performance also depends on workload, drivers, memory, shaders, and system conditions.

Can WebGL be disabled even on a capable GPU?+

Yes. Browser settings, enterprise policy, driver blocklists, virtual machines, remote sessions, or graphics problems can affect availability.

Source and scope

Use the result responsibly

This page is an educational browser-based tool. It cannot replace specialized measurement equipment, professional accounting, legal review, tax advice, compensation advice, procurement policy, contract review, or organization-specific procedures when those are required.

External reading: MDN WebGL API reference.