Clicks Per Minute Click Chronometer Run the test

Hardware check

Mouse Test

Not a speed test. This one reports which of your mouse's inputs the browser actually receives, and whether the left switch is chattering — the fault behind a mouse that double-clicks when you clicked once.

Click every button, roll the wheel both ways, and move the pointer inside this panel.

Left button 0
Middle / wheel click 0
Right button 0
Back (button 4) 0
Forward (button 5) 0
Wheel up 0
Wheel down 0
Tilt left 0
Tilt right 0
Movement, counts 0
Inputs seen
0
Double clicks
0
Chatter events
0
Last gap
—

How to

How to test your mouse

  1. Click every button inside the panel. Left, right, middle, and the side buttons if your mouse has them. Each cell lights and counts.
  2. Roll the wheel both ways. If your wheel tilts sideways, tilt it too — horizontal scroll has its own two cells.
  3. Move the pointer across the panel. The movement readout confirms the sensor is reporting.
  4. Click the left button repeatedly, at a normal pace. Any two presses closer together than 45 ms are logged as chatter, because no hand produces that.

The measurement

Reading the result

What switch chatter is

A mouse switch closes a metal contact. As the contact settles it bounces, and the electronics normally ignore that bounce for a few milliseconds — the debounce window. When a switch wears out, the bounce grows longer than the window, and one physical press arrives as two clicks.

That is what people mean when they say a mouse has started double-clicking on its own. It shows up here as a chatter count with a gap of a few milliseconds, far below anything a hand can produce, which is how this tool tells a fault apart from a fast deliberate double-click.

A blank cell is not always a fault

The back and forward buttons often never reach the page. Browsers claim them for navigation, and on some platforms the page is never told they were pressed. If those two cells stay dark while everything else lights, your mouse is almost certainly fine.

Horizontal tilt is the same story on hardware rather than software grounds: most mice do not have it. A dark tilt cell usually means the feature does not exist on your device rather than that it is broken.

The bench

Every tool on the bench

One instrument per input, all on the same clock. A rate is only comparable against the same tool and the same interval.

Background

Read the method

Longer entries on what this tool measures and where the number comes from.

Polling rate: what a millisecond buys

A 1000 Hz mouse reports a click up to one millisecond after the switch closes. Here is where that sits against everything else in the chain.

Read the entry

Scroll wheel: notches per minute

A wheel is a switch with detents. Counting notches per minute exposes something a click test cannot — whether your wheel is dropping input.

Read the entry

Auto-clickers and meaningless numbers

A script firing 50 clicks a second reads as 3,000 CPM. The chronometer counts it, says so, and explains why filtering would be worse.

Read the entry

Questions

Asked of the chronometer

How much chatter means my switch is failing?

One stray event in a run can be noise. A handful that reappears every time you test, always on the same button, is a switch on the way out. Confirm it on the double click test, which times the gap between the pair and states where the line is.

Does this check whether my sensor is accurate?

No. The movement readout only confirms the browser is being told the pointer moved. Measuring how far it moved per inch of desk is a different job, and the mouse DPI test is the page for it.

Can I test a trackpad here?

Partly. Left click, right click and movement all register. Wheel, side buttons and horizontal tilt have no equivalent on a trackpad, so those cells stay dark and mean nothing about your hardware.