Free Online Mouse Tools
Fourteen free browser tools for testing a mouse and tuning sensitivity. Pick a tool below, or use the table at the end to find the right one for your problem.
Want to know your DPI first? Measure it in the browser. Nothing is uploaded.
Open the free DPI analyzerMouse hardware tests
Check that buttons, the scroll wheel and the sensor work correctly.
Mouse TesterFree online mouse tester. See live pointer position, every button press, wheel scroll and a rolling event log to find stuck or unresponsive inputs.Button TesterFree mouse button tester. Check that left, middle, right, back and forward buttons register presses, with each button lighting up when detected.Double-Click TesterFree double-click tester. Measure the time between clicks and flag rapid pairs under a chosen threshold to spot a worn or misfiring mouse switch.Scroll TesterFree mouse wheel test. Track scroll direction, running totals and reversals to find a skipping, jumping or reversing scroll wheel.Movement TesterFree mouse movement test. Trail your cursor and compare path length with straight-line distance to see how smooth your pointer motion is.Jitter TestFree mouse jitter test. Hold the pointer still for 3 to 8 seconds and measure RMS deviation to see how steady your pointer is.Pointer Event FrequencyEstimate how many pointer move events per second your browser receives. A browser-based lower bound for mouse polling rate in Hz.
Aim and speed tests
Measure click speed, reaction time, tracking and accuracy.
CPS TesterFree CPS test. Measure your clicks per second over 1, 5 or 10 seconds and compare single-finger clicking with jitter or butterfly techniques.Reaction Time TestFree reaction time test for mouse users. Click the instant the box changes colour, with false-start detection, average and median results.Tracking TestFree mouse tracking test. Follow a moving target for 8 to 20 seconds and measure your average and maximum deviation.Accuracy TestFree mouse accuracy test. Click targets as they appear, with 10, 20 or 30 targets, and see your hit rate and average time per target.
Sensitivity calculators
Work out eDPI and cm/360 and see how multipliers change speed.
eDPI CalculatorFree eDPI calculator. Multiply DPI by sensitivity, solve for the DPI needed for a target eDPI, and compare two setups side by side.cm/360 CalculatorFree cm/360 calculator. Convert DPI, sensitivity and yaw into the physical distance for a 360 degree turn, or solve for sensitivity from a target.Sensitivity ToolInteractive demo showing how a sensitivity multiplier scales pointer movement. A grey dot follows your pointer, a cyan dot follows it scaled.
Which tool should I use?
| Problem | Start with |
|---|---|
| A click registers twice | Double-click test |
| A side or middle button does nothing | Button tester |
| Scroll wheel jumps the wrong way | Scroll tester |
| Cursor shakes or drifts | Jitter test and movement test |
| Movement feels choppy | Polling rate test |
| Copying a sensitivity from another player or game | eDPI calculator and cm/360 calculator |
| Not sure what DPI your mouse uses | DPI analyzer |
All tools run locally in your browser and nothing is uploaded. Results are estimates under your current system settings, so keep pointer speed, acceleration and browser zoom the same when you compare runs. For background, read the DPI guides.