Double Click Test
To test for double clicking, click once slowly, about 20 times. If the page shows two presses less than about 80 ms apart when you only pressed once, the switch is probably worn or dirty. A deliberate human double click is usually slower than that, so it is not flagged. You can adjust the threshold.
How it works
Point at the grey box and use your mouse there. The page reads your browser’s mouse events and never sends them anywhere.
These tests need JavaScript. The explanations below work without it.
Made for a real mouse. On a phone or tablet, only the click speed test works with touch. In Firefox and Safari a side button may still go back a page; the page tries to stop that.
Slow-click double click test
Click slowly here, one click at a time
Your side button tried to go back or forward. The page stopped it.
Gaps between presses of the same button (red = suspected double click)
How to do it
- Point at the test box.
- Click once, slowly and firmly, about once a second.
- Repeat until the counter reaches 20 clicks.
- Read the result: any doubled clicks and the fastest gap in milliseconds.
How the test decides
The page records the time of every press of each button. When two presses of the same button come closer together than the threshold, it marks the second one as a suspected double click and shows the gap in red. It also counts "release bounces": the button seems to let go and press again within 30 ms.
The browser’s own double-click event is counted separately. That one uses your system’s double-click speed, so it fires for every normal double click too and is only shown for comparison.
Frequently asked questions
What does a faulty double click look like in the test?
You press once, but the counter goes up by two and a very short gap appears in red, often only a few milliseconds. If that happens several times in 20 slow clicks, the switch is likely chattering.
What threshold should I use?
Start with 80 ms. A fault usually gives gaps far shorter than that. If you click quickly on purpose and get flagged, lower it a little. If you suspect a fault but nothing is flagged, raise it toward 150 ms.
Can a mouse double click because of software?
Yes. A very slow double-click speed setting, some mouse software and macros, or accessibility features like ClickLock can change how clicks behave. Test on another computer: if the fault follows the mouse, it is the hardware.
Is a double-clicking mouse covered by warranty?
Often, because it is a common hardware fault. Check the warranty period from the maker and save a screenshot or the saved image of this test as evidence before contacting support.
Which button should I test?
Test the left button first, because it is used most and wears out first. Then test the right button. The slow-click counter counts both, and the gap list shows which button each gap belongs to.
Last updated: October 13, 2026