Mouse Test (Double Click & Button Tester)

How to use the mouse tester

Move the pointer into the grey test area and press buttons. The matching button on the mouse drawing lights up blue, then turns green once it works. If a click looks like an unintended double click, the button turns red and the count goes up.

• Five buttons: left, right, wheel click, and the thumb back and forward buttons. The context menu and middle-click autoscroll are suppressed inside the test area.
• Double click (chatter): click the left button normally 50+ times. A red ripple or a "Suspect double click" row means trouble.
• Scroll wheel: scroll over the area to count notches. The strip shows each event’s direction; a red bar while scrolling one way is a reverse jump.
• Drag hold: hold the left button and draw circles. A broken line with a red dot means the button signal dropped while held.
• Copy result: copy per-button counts for a warranty claim or a sale listing.

What is the mouse double-click problem?

The double-click problem is when one press of a button registers as two clicks. Folders open when you meant to select them, drags drop halfway, and single shots fire twice in games. It is commonly caused by a deteriorating switch under the button, though dust, USB connection issues, drivers or software can cause similar symptoms.

This tester does not rely on the browser’s dblclick event. It records press and release times itself, to the millisecond, and flags a press that comes sooner than the threshold (60 ms by default) after the previous release. You can adjust the threshold from 10 to 150 ms and every recorded click is re-evaluated instantly.

How to fix a mouse that double clicks

Logitech support suggests these checks for a single press producing a double click. They apply to any brand.

• Test the mouse on a different computer to see whether the problem follows the mouse.
• Blow into the button gap or use a can of compressed air to clear debris.
• Plug the mouse or receiver into a different USB port, directly rather than through a USB hub.
• Check the double-click speed setting: Mouse properties in Windows, or the double-click speed setting on a Mac.
• If it continues and the mouse is under warranty, contact the manufacturer. The copied result helps describe the symptom.

Scroll wheel test and reverse jumps

If the page jerks backwards while you scroll one way, the wheel encoder may be misreading notches. The tester counts a reverse jump when a single opposite-direction event appears between rapid events in the same direction. Deliberate direction changes are not counted.

Tilt-wheel and horizontal scrolling are shown separately as ← and →. The last delta value and unit are shown too, but they depend on OS and browser settings and free-spin modes, so focus on direction rather than size. Trackpads may behave differently because of inertial scrolling.

Back, forward and middle buttons

Chromium-based browsers such as Chrome and Edge pass the back and forward buttons to web pages, so pressing them inside the test area records the click without navigating away. Firefox does not pass these buttons to pages, so they cannot be tested there and may navigate back.

If vendor software (Logitech G HUB, Razer Synapse and so on) maps a button to a keyboard shortcut or macro, it arrives as a different signal and will not show up here. Check the button assignments first.