Free WebGPU Test for Browser Support, GPU Limits, Shader, and Compute
Check whether WebGPU is exposed, request an adapter and device, inspect features and limits, verify shader compilation, create and map buffers, run a small compute correctness test, and export a local compatibility report.
Free WebGPU Test for Browser Support, GPU Limits, Shader, and Compute
Use the live controls below, then review the explanation, limits, checklist, and comparison guidance before acting on the result.
Adapter report
Preferred canvas format and device state
| Limit | Value | Why it matters |
|---|
Built for an actual decision, not a single output
navigator.gpu support detection
Adapter request diagnostics
Adapter information when exposed
Device feature inventory
Device-limit explorer
Preferred canvas-format report
WGSL shader compilation check
GPU buffer creation test
Mapped readback verification
Compute pipeline correctness test
Device-lost monitoring
Copy and download compatibility report
How to interpret a WebGPU test
WebGPU is a modern browser API for graphics and general-purpose GPU workloads. Support depends on the browser, operating system, graphics drivers, hardware, security policy, and whether the page is running in a context where the browser allows the API.
A successful adapter and device request is stronger evidence than checking navigator.gpu alone. Features and limits are negotiated per device, so applications should request only the capabilities they need and handle unavailable optional features.
The compute check on this page runs a small WGSL shader, writes deterministic values into a storage buffer, copies the data into a readable buffer, and verifies the result. It is a correctness test, not a standardized GPU benchmark.
Worked example: validating a browser before running a WebGPU demo
Run the capability scan first. If an adapter and device are available, review required limits and features. Then run the shader and compute correctness checks. A failure at adapter request is fundamentally different from a shader compilation error or a failed compute readback.
Understand the result before you trust it
API presence is only the first gate
navigator.gpu can exist even if no suitable adapter is returned.
Features are optional capabilities
Applications should query and request only features they actually need.
Limits define safe workload bounds
Buffer sizes, bind groups, workgroups, and texture limits can differ by adapter.
WGSL is WebGPU's shader language
Compilation diagnostics are important for portability and correctness.
Readback verifies more than dispatch
Mapping a copied result lets the page confirm the compute output.
Correctness is not performance
A tiny compute shader passing does not predict a complex workload's frame rate.
Key checks, formulas, and limitations
| Stage | API object | What success means | If it fails |
|---|---|---|---|
| Entry | navigator.gpu | Browser exposes WebGPU | Browser/context may not support it |
| Adapter | GPUAdapter | A suitable graphics adapter was found | Platform or policy limitation |
| Device | GPUDevice | Commands and resources can be created | Requested capability unavailable |
| Shader | GPUShaderModule | WGSL compiled without errors | Review compilation messages |
| Compute readback | Buffer + mapAsync | Pipeline produced expected data | Pipeline, command, or shader issue |
Three quick checks
Quality-control checklist
Recent saved summaries on this device
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Webgpu Test: FAQ
Is this WebGPU test free?+
Yes. It runs in the browser without signup, email, phone number, or payment.
Why can WebGPU be unavailable on a modern GPU?+
Browser version, operating system, driver status, security context, remote sessions, virtual machines, or policy can affect availability.
Does the test reveal my exact GPU model?+
Only if the browser exposes adapter information. Browsers may limit or generalize hardware details.
Is the compute check a benchmark?+
No. It verifies a small deterministic compute path and readback. It is not a standardized performance benchmark.
Should an app request every available feature?+
No. Request only features needed by the application and handle optional capabilities defensively.
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 WebGPU API reference.