Rendering performance test
Browser FPS Test
Measure browser animation frame rate, frame-time stability, and likely dropped frames during a live visual test.
Browser FPS Test
Live browser animation
What this tool measures
The FPS test runs a visible browser animation and records frame delivery over time. Average FPS and long frames reveal rendering instability.
How to use it
- Close unusually heavy tabs if you want a clean baseline.
- Start the five-second animation.
- Compare average FPS, minimum instantaneous FPS, and dropped-frame estimate.
Uses for a browser FPS test
- Investigate stuttering web animation
- Compare hardware acceleration on and off
- Check whether a high-refresh display receives sustained browser frames
FPS and refresh rate
Refresh rate describes the display update rhythm; FPS describes frames delivered by this browser animation. They may match or diverge under load.
Repeat the test
Use several runs under the same conditions before drawing a conclusion from a single value.
Compare like with like
Keep the browser, window size, device connection, and power mode consistent when comparing results.
Frame delivery is stable
Average FPS near the refresh rate, without frequent minimum-FPS drops, usually indicates smooth rendering for this animation.
Many long frames
Frame-time spikes can come from background applications, extensions, page layout work, GPU drivers, or power-saving limits.
Measurement limits
The result describes this page and browser session; it is not a game benchmark or GPU stress test.
Privacy
Measurements are calculated locally in your browser and are not uploaded by the tool.
How to improve FPS test stability
Keep the page active
Background-tab throttling, browser extensions, and other busy applications can affect browser measurements.
Retest under controlled conditions
Reload the page, keep the same settings, and repeat the measurement before treating an outlier as a fault.
Reduce background load
Close video playback, downloads, and resource-heavy tabs, then run the same test again.
Compare under matching conditions
Keep window size, zoom, display mode, and power profile the same when comparing browsers or settings.
Browser FPS questions
Is this a hardware certification test?
No. It is a browser-side diagnostic intended for comparison and troubleshooting, not laboratory certification.
Where is the test data processed?
The measurement is calculated in this browser tab and the tool does not upload the raw test input.
Is browser FPS the same as game FPS?
No. This page measures its own browser animation pipeline and does not reproduce a game's rendering workload.
Why does FPS not exceed the refresh rate?
requestAnimationFrame normally follows the display refresh cycle, so its common upper limit is close to the current refresh rate.