Utilore

Mouse Test

Click inside the test area with every button and spin the wheel: each one lights up when the browser sees it. The page also watches the gap between presses, because the most common mouse fault is not a dead button but a worn switch that fires twice from one click.

Click inside the grey area with every button, spin the wheel and move the pointer around. The right-click menu is switched off inside that area only.

Test area
Left 0
Wheel click 0
Right 0
Back 0
Forward 0
Wheel up
Wheel down

Nothing leaves this tab: the page reads mouse events itself and sends nothing anywhere. Two limits worth knowing: side buttons often do not reach the browser at all because the mouse driver turns them into keyboard shortcuts, and the measured polling rate is capped by what the browser reports — a 8000 Hz mouse will usually read as 1000.

Nearby: Keyboard Test, Screen Resolution, Mic Test, Webcam Test

How to use

  1. Click inside the grey area with the left, right and wheel buttons, then the side buttons if your mouse has them. Each lamp lights up and counts its presses.
  2. Scroll the wheel up and down. Both directions have their own lamp, because a wheel that only works one way is a real and common fault.
  3. Move the pointer around the area for a couple of seconds — the polling rate appears once there is enough movement to measure it.
  4. If a warning about switch chatter appears, keep clicking that button a dozen more times: chatter is intermittent, and the count tells you how bad it is.

Good to know

Double-clicking on its own is a worn switch, not a setting

A mouse that opens files when you meant to select them, or closes two tabs at once, almost always has a worn microswitch. The metal contact inside loses its springiness, and one press makes and breaks the circuit several times in a few milliseconds — the computer sees two clicks. This page measures the gap between presses and calls it chatter below 60 ms, because a human hand cannot click twice faster than about 80–100 ms while chatter lands in the 5–30 ms range. The threshold sits between them, deliberately on the cautious side: better to miss a mild case than to accuse a healthy mouse.

What the browser cannot see

Side buttons often never reach the page. Mouse drivers commonly map them to «browser back» and «browser forward» at the system level, so the browser navigates instead of passing the press on — if those lamps stay dark, that says nothing about the buttons. The polling rate has a similar ceiling: the browser reports pointer movements at its own pace, so a 4000 or 8000 Hz gaming mouse will usually measure as 1000. And nothing here can distinguish a broken button from one the driver has remapped to something else.

The test area, and only the test area

Inside the grey rectangle the right-click menu and middle-click autoscroll are switched off, because otherwise the menu covers the page on the first right-click and the middle button starts scrolling instead of reporting itself. Outside that rectangle the mouse behaves completely normally: a tool that checks your mouse has no business taking over the whole page while it does it.

Frequently asked questions

My mouse double-clicks when I click once. Can this test confirm it?

Yes — that is what the chatter warning is for. Click the affected button twenty or thirty times at a normal pace. If the page reports two presses a handful of milliseconds apart, the switch is worn. It is intermittent by nature, so a single clean run does not clear a mouse; a single chatter event is already enough to condemn one.

The side buttons do not light up.

That usually means the driver never gave them to the browser: most mice map them to back and forward at the system level. Watch the page — if the browser navigates away when you press them, the buttons work fine and it is the mapping that hides them.

Why does my 8000 Hz mouse show 1000?

Because that is as fast as the browser reports pointer movement. The measurement is of what reaches the page, not of what the mouse sends over USB. Anything up to 1000 Hz is measured honestly; above that the number is the browser's ceiling rather than your mouse's rate.

Can it test a trackpad?

Partly. Buttons and scrolling work, and the pointer path is measured, but a trackpad has no polling rate in the mouse sense and no microswitch to wear out in the same way. Chatter warnings on a trackpad are more likely to mean the surface registered two taps.

Is anything sent anywhere?

No. The page reads mouse events itself and shows what it read. Nothing is sent to a server, stored or logged, and the page works with the network switched off.

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