FPS Test
Online FPS test tool with real-time frame rate monitoring, stability analysis, and device performance rating for web animation debugging, game smoothness checks, and device diagnostics.
Real-time FPS
Track browser frame rate under animation load and observe fluctuation in real timeMin
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Avg
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Max
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Performance Assessment
Overall Assessment
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Optimization Suggestions
Test Settings
Test History
About FPS Testing
FPS (Frames Per Second) indicates how many frames are rendered each second and is a key metric for visual smoothness.
Around 60 FPS usually feels smooth, while values below 30 FPS often cause visible stutter.
This tool uses dynamic animation load with statistical analysis to estimate real browser-side rendering capability.
FPS Testing Guide
Use this FPS tester to evaluate browser rendering smoothness, frame stability, and device pressure tolerance for development and diagnostics.
Core Features
- Live circular FPS gauge with color levels for quick smoothness judgment.
- Automatic min/avg/max statistics and stability classification.
- Three intensity levels from daily browsing simulation to stress load.
- Configurable duration, VSync mode, and optional background testing.
- Built-in optimization suggestions and local history comparison.
How to Use
- Choose test duration and intensity, then configure VSync/background options if needed.
- Click Start Test and observe live FPS and motion area behavior.
- After completion, review smoothness, stability, and device rating.
- Use recommendations and history records to validate tuning effects.
Metric Interpretation
- Average FPS: overall smoothness baseline for daily experience.
- Minimum FPS: worst-case frame drop under peak pressure.
- Stability: fluctuation-based consistency score across the session.
- Device capability: simplified level based on sustained and peak FPS.
Tuning Tips
- Prioritize minimum FPS when debugging animation jank.
- If average FPS is low, reduce background load and retest.
- Compare browsers or versions to inspect rendering pipeline differences.
- Use high intensity mode for stress diagnostics on complex pages.
FAQ
- Why does FPS drop after switching tabs? Browsers throttle background page rendering.
- Why is FPS more stable with VSync on? Frame pacing aligns better with display refresh cycles.
- Can this replace in-game FPS tests? It is a reference metric, but engines and workloads differ.
Privacy & Security
The tool runs locally in your browser. Test records are saved only in localStorage on your device and are never uploaded.