Mouse Button Test

Press any mouse button and watch the matching part light up: left, right, middle, scroll and side buttons.

L R 5 4

Last pressed: —

Left
0
Right
0
Middle
0
Back (M4)
0
Fwd (M5)
0
Scroll ↑
0
Scroll ↓
0

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Mouse Button Test and Mouse Checker

What the mouse test checks

The tester shows whether your browser receives left, right, middle, scroll wheel and thumb side button input.

Find broken or double-clicking buttons

If one press counts twice, the switch may be bouncing. If a button does not light up, it may be remapped, disabled or failing.

Testing side buttons 4 and 5

Side buttons usually trigger browser Back and Forward. This page cancels that behavior so you can test them safely.

Scroll wheel and middle click

Test wheel up, wheel down and wheel press separately to catch skipped steps, reverse scrolling or a failing encoder.

Why gamers test extra buttons

Gaming mice often bind side buttons to push-to-talk, abilities, weapon swaps or macros, so clean input matters.

Cleaning and troubleshooting

Dust and worn switches can cause missed clicks or double-clicking. Cleaning may help, but persistent faults may need repair.

Mouse Testing Guides

How to Test Mouse Buttons Online Mouse Debounce Time and Double-Clicking Best Gaming Mice for CPS and Click Tests Input Lag Checklist for Browser Tests

Mouse Button Test - Frequently Asked Questions

How do I use the mouse button test?
Press each mouse button and watch the matching part of the on-screen mouse light up.
Why do side buttons navigate back or forward?
Browsers map mouse buttons 4 and 5 to Back and Forward, so this page blocks that behavior while testing.
Do I need fullscreen to test side buttons?
No. Fullscreen is optional; the page prevents Back and Forward directly on the mouse event.
Why does right-click not open a menu here?
The context menu is disabled so right-click can be tested without a menu covering the diagram.
What does double-clicking from one press mean?
It often means the switch is bouncing because of wear, dirt or a failing micro-switch.
Why does a button not show up?
It may be remapped by mouse software, unsupported by the device or physically failing.
Can I test a laptop touchpad?
Yes for left, right and scrolling on most touchpads. Middle and side buttons depend on the hardware.
Can this page test mouse speed?
This page checks button function. For speed, use the CPS test or drag click test.

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