Double click test
Click each button once in a while, slowly. A healthy switch gives one click per press. If the table shows clicks only a few milliseconds apart after single presses, the switch may be chattering, which causes accidental double clicks.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Click inside the pad, pressing each button one clean press at a time.
- Read the table: clicks, last gap, shortest gap and clicks under 80 ms.
- Press Reset to start again.
How it works
For each button the page stores the time of the previous click. The gap is the difference between the browser timestamps of two presses. A gap under 80 ms increases the flagged counter.
Worked example
Presses at 1000 ms, 1050 ms and 1400 ms give gaps of 50 ms and 350 ms. The shortest gap is 50 ms, one click is flagged, and the clicks count is 3.
Tips
- Compare with a second mouse on the same machine.
- Chatter often appears first on the left button.
Frequently asked questions
What is mouse button chatter?
A worn or dirty switch can register two clicks from one press. The extra click follows within a few tens of milliseconds, so you see double clicks you did not make, or dragging that drops.
Why 80 ms?
It is a rule of thumb. Deliberate repeated clicks by one finger are usually well over 100 ms apart, so a gap under 80 ms after a single press is suspicious. It is not a measured standard.
How should I test?
Press each button slowly, one clean press at a time, 20 or more times. If the flagged count rises although you pressed once, test again and compare. One flag is not proof.
Does it test the right button and the side buttons?
Yes. Left, middle, right, back and forward are tracked separately. The context menu is blocked only inside the pad.