Mouse Tester

How to run the tests

1. Move the pointer into the Test area. Press the left, middle (wheel click) and right buttons one at a time and watch their counters. Each physical press should add exactly one.
2. Roll the wheel up and then down. "Scroll up" and "Scroll down" count wheel events, not distance.
3. Double-click quickly to check the "Double clicks" counter. Press Reset to zero everything and start again.
4. For speed, scroll to the Click speed test, then click the pad repeatedly. The 5-second timer begins on your first click. When it ends, the number on screen is your final clicks per second, and the best result of the visit is kept next to it.

What exactly is being counted

The page listens for the moment a button goes down, not when it comes back up, so each press is counted once at press time. Left is button 0, middle is button 1 and right is button 2. Scroll counting looks at the vertical direction of each wheel event: negative means up, positive means down. Sideways scrolling on a tilt wheel or trackpad has no vertical movement and is not counted. Extra thumb buttons are not shown in the counters.

Inside the pad, the browser's normal right-click menu and page scrolling are switched off so that those actions can be counted without the page jumping around. Outside the pad, everything behaves as usual.

Reading the click speed result

While the test is running, the large figure is a live average: clicks so far divided by seconds elapsed. At the end it becomes the total clicks divided by 5. Example: 38 clicks in the window gives 7.6 CPS. A click registered after the 5 seconds have elapsed is ignored.

Any mouse button counts in the speed pad, including right and middle, so you can compare buttons. Very short tests are noisy: the first second often reads high or low because the average is based on a tiny time span. Only the final figure is comparable between attempts.

Spotting a faulty mouse

• Phantom double clicks: if one deliberate single click often moves the left counter by two, the switch may be bouncing. Wear in the microswitch is a common cause and tends to get worse over time.
• Dropped clicks: if the counter sometimes misses a press you are sure you made, check the cable, receiver or battery first, then the switch.
• Wheel problems: if scroll up registers when you only roll down, or one direction stops counting, the wheel's encoder may be dirty or worn. A burst of compressed air around the wheel sometimes helps.
• Wireless issues: test again close to the receiver and with fresh batteries before blaming the mouse.

Testing on a second computer, or with a different USB port, helps separate a hardware fault from a driver or software setting. Also check the operating system's double-click speed setting, as an unusually slow setting can make two ordinary clicks feel like a double-click.

Tips and limits

• CPS depends on technique. Ordinary single-finger clicking, jitter clicking and butterfly clicking differ greatly, and some are uncomfortable or strain the hand. Stop if you feel pain.
• Touchscreens and trackpads may report taps differently from a real mouse, so results are best from a physical mouse.
• Results are not stored. Reloading the page clears the counters and your best score.
• The test shows what the browser receives. Gaming mice may do extra things (macros, debouncing) in their own driver software before the click ever reaches the page.
• This page measures buttons and wheel only. It does not test sensor tracking accuracy or polling rate.

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