# Hardware & Peripheral Testing

> Verify your mouse, keyboard, gamepad, and monitor are performing as expected with free browser tools that test hardware locally without any drivers.

## Tools in this collection

- [Mouse Acceleration Detector](https://www.teafun.cyou/tools/mouseaccel/) — Find out if your OS mouse acceleration is active. Move slowly then quickly — we analyze your cursor's nonlinearity.
- [Mouse Sensitivity Converter](https://www.teafun.cyou/tools/sensitivity/) — Convert your mouse sensitivity across 50+ games instantly. Enter your DPI and sensitivity to see your cm/360° and equivalent settings in every game.
- [Gamepad Tester](https://www.teafun.cyou/tools/gamepad/) — Test your controller inputs, check for stick drift, and set custom deadzones. Runs entirely in your browser.
- [Keyboard Heatmap](https://www.teafun.cyou/tools/keyboard-heatmap/) — Track your most-used keys in real time, build a heatmap from actual typing, and export the result as a PNG.
- [Monitor Refresh Rate](https://www.teafun.cyou/tools/monitor/) — Detect your monitor's refresh rate in your browser.

## FAQ

### Do I need to install drivers or software?

No. All tools run directly in your browser using standard web APIs. No downloads, extensions, or admin rights are required.

### Can these tools replace manufacturer software?

For quick diagnostics and verification they work well. For advanced configuration like custom DPI curves or RGB lighting you still need the manufacturer app.

### My controller shows movement when I am not touching it — what does that mean?

That is stick drift: the analog stick reports input at rest, usually from wear or dust. The gamepad tester confirms it and shows how severe it is, which helps you decide between cleaning, recalibrating, or replacing the controller.

### The monitor test shows a lower rate than my display is rated for — why?

A capped refresh rate usually comes from the cable, the OS display settings, or a graphics-driver default rather than the panel itself. Check that you are using a cable rated for the refresh rate and that the rate is selected in your system display settings.