Mouse Tester
Guide & FAQClick inside this area with every button.
Right-click menu, back and forward navigation are blocked here so you can test them.
Press a button to start. Two presses of one button closer together than the threshold are counted as a possible faulty switch.
Event log
Scroll the wheel over this area, in both directions and at different speeds.
Tilt the wheel sideways to test horizontal scrolling. The page does not scroll while the pointer is here.
A healthy wheel only reports one direction while you spin it one way. A direction glitch is a tick the wrong way in the middle of a fast spin, a common sign of a worn encoder.
Last wheel events
Move the mouse quickly in circles inside this box.
Polling rate is how often the mouse reports its position: 125, 500, 1000 Hz and up to 8000 Hz on newer gaming mice. Browsers and operating systems can cap what a web page sees, so treat the number as an estimate and move fast and steadily.
Click here to start. The timer starts on your first click.
- Put a ruler next to your mouse pad and choose the distance below.
- Press Start measuring. The cursor disappears and the page captures your mouse.
- Move the mouse in a straight line exactly that distance, then press Esc or click to finish.
Counts moved: 0
Where the browser allows it, the page reads raw mouse counts, which skips Windows pointer speed and acceleration. Otherwise the result is only a rough guide to how far the on-screen cursor travels.
Guide: Mouse Tester
Check every button
Click inside the test area with each mouse button. Left, middle, right, back and forward light up while held, and each one keeps a count. The page also compares the time between presses of the same button. Two presses closer together than the double-click threshold are flagged, which catches the classic fault where a mouse registers a second click on its own. Click slowly and deliberately for the cleanest result.
Scroll wheel and tilt
Spin the wheel up and down and tilt it sideways. The counters show every tick. A direction glitch is a tick in the wrong direction in the middle of a spin, usually caused by dirt or wear on the wheel encoder.
Polling rate
Move the mouse quickly in circles over the graph. The tool reads the time stamps of pointer reports, using raw pointer updates and coalesced events when your browser provides them, and shows the current, average and peak rate. Common values are 125, 500 and 1000 Hz, with up to 8000 Hz on new gaming mice.
CPS test
Pick 1 to 60 seconds, click as fast as you can and read your clicks per second. Your best score is stored in your own browser.
DPI estimate
Enter the distance you will move, press Start measuring and slide the mouse exactly that far along a ruler. The page captures the mouse, counts the movement and works out the DPI. If you know the DPI you set, enter it to see the difference.
- Test with the mouse plugged straight into the computer, not through a hub.
- Turn off pointer acceleration for the most honest DPI reading.
- Wireless mice may report lower rates in power-saving mode.
FAQ
How do I know if my mouse button is double-clicking by itself?
Use the Buttons tab and click slowly, one deliberate click at a time, about 20 times. If the counter for that button shows double clicks, two presses arrived closer together than the threshold (80 ms by default) although you pressed once. That is the signature of a worn or oxidised micro-switch. Lower or raise the threshold to see how bad the bounce is.
Why does my polling rate read lower than the box says?
The page can only see what the browser passes on. Many browsers merge or limit pointer events, a slow or smooth movement produces fewer reports, and some systems cap the rate. Move the mouse fast and steadily in circles for a few seconds and watch the peak value. A 1000 Hz mouse normally shows 900 to 1000 Hz; a very different number can point to a USB hub, power saving or the wrong setting in the mouse software.
How accurate is the DPI test?
Where the browser supports raw mouse input, the page counts the raw counts your mouse sends and divides by the distance you moved, which is the true DPI to within the accuracy of your ruler and straight hand movement, usually 5 to 10 percent. Without raw input the result reflects the operating system's pointer speed and acceleration, and the tool tells you which case applies.
What is a good CPS score?
Most people click 5 to 7 times per second with a normal click. Jitter clicking reaches 8 to 12 and butterfly clicking can pass 14 on a good mouse. Scores above about 15 on a clean mouse are rare and can also be a sign of a bouncing switch. Longer tests (10 to 60 seconds) show endurance rather than a short burst.
Do the back and forward side buttons work?
Yes. While your pointer is inside the test area the page blocks the browser's back and forward navigation and the right-click menu, so you can press every button and see it register. Outside the area the buttons behave as usual.
Does it send my data anywhere?
No. All the tests run in your browser with no server and no tracking. The only thing remembered is your best CPS score, which is kept in your own browser storage and can be cleared at any time.