How to use the mouse and touchpad test
1. Click each button inside the test area: left, right, middle (pressing the wheel) and the side buttons, if your mouse has them. Each one lights up on the mouse drawing and gets a counter.
2. Scroll the wheel up and down. On a touchpad, scroll with two fingers and pinch.
3. Draw across the whole area. On a touchpad, cover the entire surface: a strip where the line breaks or jumps points to a dead spot.
4. Move the mouse quickly to measure the polling rate.
Mouse double clicking by itself
If a single click sometimes becomes two, the button’s micro switch is worn or oxidized: the contact bounces and sends two clicks within a few milliseconds. The test counts this under "Unwanted double clicks" whenever two clicks of the same button arrive less than 80 ms apart, too fast to be intentional.
What to do: clean around the button with compressed air, check whether the mouse is still under warranty (it is a common, covered defect) or replace the switch, a cheap repair on good mice. Raising the double-click speed in Windows does not fix the fault, it only hides part of it.
Scroll wheel jumping or going backwards
If the page moves up when you scroll down, or scrolling jumps, the wheel sensor (encoder) is dirty or worn. In the test, scroll slowly in one direction only: if counts appear in the opposite direction, the wheel is faulty. Compressed air and isopropyl alcohol on the encoder often fix it; if not, the wheel needs replacing.
Touchpad not working or failing in some spots
Touchpad completely dead: many laptops have a key (F6, F7, F9 or similar, with a touchpad icon) that turns it off. On Windows 11, also check Settings > Bluetooth & devices > Touchpad and make sure it is on.
Failing in some spots: use the drawing area and cover the whole touchpad with strokes. A region where the line never appears or keeps breaking points to a sensor fault or moisture and dirt on the surface. Clean it with a slightly damp cloth and test again; if it still fails, the touchpad needs replacing.
Three- and four-finger gestures are handled by the system and never reach the browser, so they do not show in the test.
Polling rate
Polling rate is how many times per second the mouse reports its position to the computer. Regular mice run at 125 Hz, gaming mice at 500 Hz, 1000 Hz or more, and touchpads usually sit between 60 and 125 Hz. The measured value also depends on the browser and display, so treat it as a reference, not a lab measurement.
Side buttons and the browser back button
Side buttons normally work as back and forward in the browser. Inside the test area the test tries to stop them from changing the page, but some browsers may still go back. If that happens, the button works: use the browser forward arrow to return to the test.
Frequently asked questions
How do I test my mouse online?
Click each button, scroll the wheel and move the mouse inside the test area. Every working button lights up on the mouse drawing, and the counters show clicks and scrolling.
How do I know if my mouse is double clicking?
Click the left button normally several times. If the "Unwanted double clicks" counter goes up, the mouse registered two clicks less than 80 ms apart, a sign of a worn switch.
How do I test my laptop touchpad?
Use the touchpad inside the test area: tap to click, scroll with two fingers, pinch and draw over the whole surface to find spots that do not respond.
Can the test tell a mouse from a touchpad?
No. The browser receives both as a "mouse", so the test shows the same data for both. Test one at a time.
Why does my mouse scroll jump?
The wheel encoder is dirty or worn. If scrolling one way produces counts in the opposite direction, clean the encoder or replace the wheel.
What is a good mouse polling rate?
For everyday use, 125 Hz is enough. For gaming, 500 Hz or 1000 Hz makes movement more precise.