Most GPU stress-testing tools require users to download and install a desktop application.
That makes sense for detailed hardware diagnostics, but sometimes you only need a quick answer:
- Is hardware acceleration working?
- Does performance drop after the GPU heats up?
- Is an overclock obviously unstable?
- Are frame-time spikes causing visible stutter?
- Is a laptop slowing down under sustained load?
So I built WebGPUStress, a browser-based GPU stress test powered by WebGL.
What it does
The tool runs a sustained shader workload directly inside the browser and records several performance signals:
- Average FPS
- 1% Low FPS
- Frame-time stability
- Dropped-frame ratio
- Performance decay during longer runs
- An overall stability score
You can choose the duration, resolution, quality level, and target frame rate.
There are also presets for common situations:
- Quick Health Check — a short test for obvious problems
- Thermal Soak — a longer workload for detecting performance loss after heat builds up
- FPS Drop Check — useful when games feel less smooth than the average FPS suggests
Why not show only an FPS score?
A high average FPS does not always mean the experience is stable.
For example, a GPU might average 60 FPS while regularly dropping into the 30s. It may also perform well during the first minute and slow down once the cooling system becomes saturated.
That is why the test also tracks 1% lows, frame-time consistency, and dropped frames.
The goal is not to produce one impressive benchmark number. It is to show whether performance remains consistent over time.
Useful scenarios
I designed the tool for quick checks such as:
Testing an overclock
A game might run normally for a few minutes while a longer sustained workload reveals artifacts, crashes, or unstable frame pacing.
Checking laptop throttling
Some laptops start fast but lose performance after several minutes. Comparing the beginning and end of a longer run can help reveal that pattern.
Diagnosing gaming stutter
When average FPS looks normal but gameplay still feels uneven, 1% lows and frame-time stability can provide more useful clues.
Verifying GPU acceleration
It can also provide a quick sanity check for virtual machines, remote desktop environments, and newly configured systems.
Limitations
Because this runs inside a browser, it is not a replacement for tools such as FurMark, MSI Afterburner, GPU-Z, or native hardware monitoring software.
Browsers cannot directly expose GPU temperature, voltage, power consumption, or fan speed. Results can also be affected by the browser, graphics driver, power mode, background applications, and whether the tab remains active.
I see it as a fast first-pass diagnostic tool rather than a complete hardware certification suite.
Try it
You can run the test here:
No download, account, plugin, or executable is required.
I would especially appreciate feedback about:
- Performance on different browsers and GPUs
- Whether the result explanations are clear
- Additional benchmark profiles you would find useful
- Metrics that should be added or improved
The project is still evolving, so real-world testing and developer feedback would be genuinely useful.
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