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.
Collection
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.
5 tools in this category
← HomeWhy this collection exists
Hardware problems are easy to overlook until they cost you in performance or productivity. This collection covers the TeaFun tools that help you test and verify your peripherals — no software installs, no admin rights, runs entirely in the browser.
Common use cases
- Check a new mouse for hidden acceleration before you commit muscle memory to it.
- Test a second-hand or aging controller for stick drift and dead buttons before a long session.
- Confirm a monitor is actually running at its advertised refresh rate after you change a cable or a driver.
What This Collection Covers
These tools verify that your peripherals behave the way the box promised. The mouse-acceleration and sensitivity tests reveal whether pointer movement is being quietly scaled by the OS or driver; the gamepad tester maps every axis and button so you can spot stick drift or a dead trigger; the keyboard heatmap shows which keys register and how often you press them; and the monitor test measures the refresh rate your display is actually delivering. All of them read directly from standard browser APIs, so there is nothing to install and no admin rights to grant. They are diagnostic tools — they tell you what your hardware is doing, not configure it.
How to Run a Check
Pick the tool for the symptom. If your aim feels inconsistent at different speeds, run the mouse-acceleration test and move the cursor slowly, then quickly — a faithful mouse traces the same path regardless of speed. For a controller, open the gamepad tester and leave the sticks untouched: any drift shows up as movement you did not make. For a display, the monitor test counts frames over a short window and reports the effective refresh rate, which is the quickest way to catch a cable or setting that has capped you at 60 Hz. Because everything runs live in the tab, you see results the moment you move or press.
Why Verify Hardware Yourself
Specifications describe what hardware can do, not what it is doing on your machine right now. A driver update, a cheaper cable, an OS pointer setting, or a worn-out stick can all quietly undercut a peripheral without any error message. A two-minute check tells you whether a frustrating session is your skill or your gear — worth knowing before you buy a replacement or rebuild muscle memory. These tests cover the common, observable faults; for deep configuration like custom DPI stages or RGB profiles you will still need the manufacturer software, but for a quick yes-or-no on whether something is broken, the browser is enough.
Featured tools
Mouse Acceleration Detector
Find out if your OS mouse acceleration is active. Move slowly then quickly — we analyze your cursor's nonlinearity.
Mouse Sensitivity Converter
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
Test your controller inputs, check for stick drift, and set custom deadzones. Runs entirely in your browser.
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
Detect your monitor's refresh rate in your browser.
FAQ
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.