Double Click Test
Click slowly, one click at a time. Any second press inside the threshold is flagged.
Each button is checked on its own.
A bounce is a second press on the same button inside the threshold. One click per second is plenty.
Bounces (newest first)
What to try when bounces show up
A rough guide to common next steps, from least to most effort. Results vary by mouse; check your warranty before opening anything.
| What you see | Possible cause | What people usually try |
|---|---|---|
| Occasional bounces, gaps well under the threshold | Worn or dirty switch contacts | Raise the debounce time in the mouse's own software if it has one; test again |
| Bounces only on fast, hard clicks | Contacts chattering under impact | Click more lightly to confirm; if it stops, the switch is near the edge |
| Bounces on one button only | That switch, not the mouse's electronics | Warranty claim, or a switch replacement by someone comfortable soldering |
| Bounces on every button | Firmware setting, wireless signal or USB port | Update firmware, try a wired connection or another port, move the receiver closer |
| No bounces here, but double-clicks in other apps | The system double-click speed, not the switch | Check the double-click speed setting in your operating system |
How this test works
Click the pad slowly, roughly once a second, the way you would click a link. Each press is timed from the browser's own event timestamp. When a second press arrives on the same button sooner than the threshold after the one before, the test flags it as a bounce and lists the gap in milliseconds.
- Clicks counts presses that were not flagged, so it should match the clicks you meant to make.
- Bounces are the extra presses inside the threshold, newest first, with the gap and the button.
- Smallest gap is the shortest time between two presses on one button so far.
- Threshold starts at 80 ms. Change it and the test resets.
What it can show: that your browser received two presses for what you meant as one click. What it cannot show: why. A clean run does not prove a switch is healthy, because a failing switch may bounce once in many clicks. Click for at least a minute, and try both soft and firm clicks.
Why mice start double-clicking
Inside the mouse, each button presses a small switch. When the switch closes, its metal contacts do not meet cleanly in one go: they touch, separate and touch again for a few thousandths of a second. The mouse's firmware is meant to ignore that chatter (this is called debouncing) and report one press.
As a switch wears, or as dirt and oxidation build up on the contacts, the chatter can last longer than the firmware's window. The mouse then reports it as a second press, and you get a double-click when you meant a single one. This is the most common cause of a mouse that double-clicks on its own, and it tends to get worse over time rather than better.
Some mice let you change the debounce time in their own software. A longer debounce filters more chatter but adds a little delay to every click, and it can also swallow the very fast presses used for butterfly or drag clicking. If raising it fixes the bounces, the switch is wearing out; the setting buys time rather than fixing it.
Before blaming the switch, rule out the simple things: a low battery or a distant receiver on a wireless mouse, a loose USB port, and the operating system's double-click speed setting, which changes how two separate clicks are read but does not create extra presses. If only one button bounces and the others are clean, the switch is the likely part.
Questions
How do I test for mouse double clicking?
Click slowly on the pad, about once a second, for a minute. If the test lists bounces (a second press that arrived within the threshold of the first), the switch reported two presses for one click.
What causes mouse double clicking?
Most often a worn or dirty switch. As the metal contacts close they can chatter, and if the mouse does not filter that out it reports a second press. Low firmware debounce settings can make it show up sooner.
What double-click test threshold should I use?
Start at 80 ms; few people can press the same button twice that fast on purpose while clicking slowly. If every bounce you see is close to the threshold, lower it to 50 ms and test again to rule out fast fingers.
Can this test fix my mouse?
No. It only shows what the browser receives. It is a check, not a diagnosis. The section below lists what people usually try next.
Does it test the right and middle buttons too?
Yes. Gaps are measured per button, so a fast left then right click is not counted as a bounce. The right-click menu is blocked on the pad only.