Mouse Checker

Move and click to see live position and which buttons are pressed. Event log shows recent mousedown, mouseup, and wheel events for testing and debugging.

Tech

Move and click anywhere to see position and button state.

LeftMiddleRightBackForward

Position

x 0y 0

Test zone

Hover here

Event log (last 50)

Click or scroll to see events.

What this tool does

Move your mouse within the test area to see live coordinates (clientX, clientY) and which buttons are currently pressed. The event log captures mousedown, mouseup, click, and wheel events with timestamps. It's a quick way to verify that all mouse buttons and the scroll wheel are working.

When you'd use this

Testing a new mouse to confirm all buttons register
Checking if your scroll wheel is skipping or registering double-clicks
Debugging mouse input in a web application
Verifying that side buttons (button 3, button 4) are detected by the browser

Mouse event details

Browsers assign button numbers starting from 0: left click is 0, middle click (scroll wheel) is 1, right click is 2, and side buttons are 3 and 4. The event log shows which button triggered each event, along with the exact coordinates where it happened. Wheel events include the scroll delta so you can check for smooth vs. notched scrolling behavior.