Double-Click Tester

1. Choose a rapid-click threshold: 100, 150, 200 or 300 ms.
2. Click steadily in the test area at your normal pace, one deliberate press at a time.
3. Watch the interval between clicks and the count of flagged pairs.
4. Repeat with each button you want to check.

Humans can click twice in well under 300 ms on purpose, so a few rapid pairs are not proof of a fault. If you click once per press and still see very short intervals, such as under 50 ms, the switch may be bouncing.

The tool shows fastest, slowest, mean and median intervals so you can see the pattern rather than one number.

Suppose you click five times at a normal pace and the tool reports these intervals: 210 ms, 190 ms, 230 ms, 25 ms, 240 ms. Four of the five are close to what you would expect from a deliberate click rhythm. The 25 ms interval is much shorter than a hand can usually repeat a press, so it deserves attention.

With the threshold set to 100 ms, that one pair would be flagged. One flagged pair in a short test is a clue, not proof. If the same button produces very short intervals again and again while you press only once each time, the switch may be bouncing, which means it briefly opens and closes as it wears.

Check the summary numbers too. A fastest interval far below the median, repeated across several tests on the same button, is a stronger sign than a single odd reading.

• Repeat the test. Run it three or four times on each button and note whether the short intervals always appear on the same one.
• Test on another computer or port. This rules out software or driver problems.
• Check mouse software for debounce. Some manufacturers include a debounce or click delay setting that can reduce the effect of a worn switch.
• Clean and inspect. Dust can affect how a switch makes contact.
• Use the warranty. If the mouse is still covered, a double-clicking switch is a legitimate reason to ask for a repair or replacement.

For a full check of every button, use the button tester and the mouse tester.

What interval counts as a faulty double click?

Intervals far below what you can click by hand, often a few tens of milliseconds, suggest switch bounce. Treat the result as an early warning, not a diagnosis.

Can software fix a double-clicking mouse?

Some mouse software offers debounce settings. A worn switch usually needs replacement or repair.

Which threshold should I use?

Start at 300 ms, then lower it to 100 or 150 ms to focus on very short intervals.