Mouse Test — check every button in one place
Click each button on your mouse and watch it light up below. If a button doesn't register, that's a strong sign of a hardware or driver issue.
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All tools run instantly in your browser — no installs, no accounts.
Scroll Test
Check your mouse wheel for reverse-scroll jumps and jitter with a live diagnostic report.
CPS Test
Measure how many clicks per second you can sustain across multiple durations.
Keyboard Test
Verify every key on your keyboard is being detected correctly by your browser.
Reaction Time Test
Measure how fast you react to a visual cue, in milliseconds.
What each button result tells you
Left / Right button
These see the most wear of any part on the mouse. If clicks register as doubled or missed, the micro-switch underneath is usually the cause.
Middle button
Often the same physical switch as the scroll wheel's click. A middle button that fails to register can mean the wheel assembly itself needs cleaning.
Side buttons
Not every mouse has these, and browsers map them inconsistently. If yours has side buttons but they don't register here, check your mouse's driver software for a remapping conflict first.
Scroll wheel
This panel confirms the wheel is producing input at all. For a deeper check of reverse-scroll jumps and wheel health, use the full Scroll Test.
Frequently asked questions
My side buttons don't do anything when I click them.
Some mice ship with side buttons mapped to system shortcuts (like "back" and "forward" in a browser) by the manufacturer's software rather than sending a raw button event. Check your mouse's configuration app to confirm the buttons are set to a standard mapping.
Why does clicking register twice from one click?
This is a classic sign of "double-clicking" caused by a worn micro-switch losing contact briefly mid-press. It's one of the most common mouse hardware failures and usually isn't fixable without replacing the switch.
Does this test work with a trackpad?
Left and right click will generally register through trackpad taps or physical clicks, but middle-click and side-button results depend on your trackpad's gesture configuration.
Is this test accurate for wireless mice?
Yes, as long as the mouse is connected and has sufficient battery. A low battery can cause the same symptoms as a hardware fault — dropped or delayed clicks — so it's worth ruling that out first.