Check your mouse buttons, wheel, click chatter and polling rate.
Click inside this area. For testing, the right-click menu and other default button actions are suppressed within the box.
🔒 Nothing you do is sent to a server — it is processed on your device.
If the same button is pressed again within a shorter interval than this threshold after the previous click, it is logged as "possible chatter". OS or mouse-utility settings and a double-click habit can also produce short intervals, so this does not confirm a fault. Treat it as a rough guide if it is detected repeatedly and unintentionally.
Not measured yet. Try clicking the same button twice quickly.
Shows the most recent interval between two clicks of the same button (within 500ms).
Horizontal scroll can be detected with a wheel or trackpad that supports it, or by scrolling while holding Shift. The numbers are an approximate running total of the amounts the browser reports.
The number of mousemove events per second the browser received while you moved the mouse a lot. Because the browser or OS can drop events, this is an approximation that can read lower than the actual polling rate. If you need an accurate value, use the utility software from your mouse maker.
🔒 Everything is processed on your device — never sent or saved.
Mice with chatter often show the following symptoms:
If any of these sound familiar, use "Chatter detection" above to see whether short re-clicks are actually logged.
To look for chatter, deliberately click slowly, one press at a time, and watch the "Chatter detection" history. Fast repeat clicking logs short intervals even on a healthy mouse, so test at a normal clicking speed. The more often the same button is logged, the more useful it is as a guide.
Chatter symptoms are sometimes caused by dust or dirt inside the mouse, and some users report that cleaning helped (results are not guaranteed). Some models also offer a "debounce" (anti-chatter) setting in the OS or the maker's utility. A common order is to try cleaning and settings first, and only consider replacing the mouse if that does not help.
Chatter is often caused by wear of the switch contacts inside the button, and tends to appear more on older mice. If cleaning and settings do not help and it happens often enough to disrupt everyday use, that is one sign it may be time to replace it. While under warranty, contacting the maker's support first is recommended.
Polling rate is how many times per second the mouse reports its position to the computer (125Hz, 500Hz and 1000Hz are common). A higher number can, in theory, make cursor movement smoother, but JavaScript in the browser can only measure "how many events the browser was able to receive", which can read lower than the true value because of browser and OS limits. For an accurate figure, the utility software from your mouse maker is more suitable.
Chatter is when a single physical click registers as two or more clicks in an extremely short interval. Common symptoms are a single click opening a file as if you double-clicked it, or a drag being dropped partway through because the button was briefly read as released. It is often caused by wear or degradation of the switch contacts inside the button.
Not necessarily. This flag alone does not confirm a fault. OS or mouse-utility settings, unintended fast repeat clicks, or a habit of double-clicking quickly can all produce short intervals. Treat it as a rough guide when it is detected repeatedly and at times you did not intend. If you are concerned, check the mouse manual or contact the maker (repairs may be free while under warranty).
It is not necessarily broken. Some mice do not have back/forward buttons at all, and on others the buttons may be remapped to a different action in the maker's software. In those cases pressing the button does not reach the browser as a standard button input, so this diagram does not react. Check the settings in the utility that came with your mouse.
This tool only measures how many mousemove events the browser received. The browser or OS may coalesce or drop events, so the number can come out lower than the actual rate the mouse sends. The value shown here is an approximation, not a precise polling-rate measurement. For an accurate figure, use the utility software from your mouse maker.
Move the mouse cursor inside the wheel-test box first, then scroll — it cannot detect scrolling outside the box. If it still does not respond, besides a faulty wheel, check whether a setting treats trackpad gestures as wheel input, or whether a browser extension is intercepting the scroll.
The page displays, but tapping with a finger cannot tell the button types (left, middle, right, back, forward), the wheel or the polling rate apart, so it is not a practical check. If you have a mouse connected over Bluetooth or an adapter, you can test that mouse. For checking a physical mouse, a computer is recommended.
Prefer the Japanese version? マウステスト（日本語版）
