Mouse Test
Check browser-visible mouse buttons, movement, and wheel input.
Move, press buttons, and scroll inside the area below. Buttons show Held while pressed and a count of detected presses. Release outside the area if needed.
Mouse input area · right-click menu suppressed here only
No mouse buttons held
- Browser coordinates
- Move here to inspect
- Last movement delta
- 0, 0
- Last wheel delta
- X 0 · Y 0 CSS pixels
Wheel values use the browser’s reported units, not physical distance or hardware polling rate. Horizontal scrolling may require a tilt wheel or trackpad.
Using a touchscreen? Attach a physical mouse to check its buttons; touch gestures do not validate mouse hardware.
How to use this test
- With a physical mouse, press and release each button inside the labeled input area.
- Move and scroll there to inspect coordinates, movement deltas, and vertical or horizontal wheel events.
- Compare Held and Released labels and press counts; Reset clears observations for another check.
What the result means
Press each button inside the area and look for its Held label and press count. Move the pointer to see browser coordinates and the last movement delta, then scroll vertically or horizontally to check wheel events. Back/forward or other exposed buttons appear if their events reach the page. Reset clears observations for a fresh check.
Know the limitations
Button names describe logical browser mappings; physical assignments can be swapped. Extra buttons may be intercepted by the browser, operating system, or device software. Wheel deltas may use pixels, lines, or pages and are not physical distance. This does not measure latency, polling rate, DPI accuracy, or low-level device health. Touch and on-screen input cannot validate a mouse switch.
If a side button or wheel event is missing
Check the device's logical button assignments and browser/OS shortcuts. Some inputs never reach the page. Release outside the area if needed; focus loss clears held indicators. To compare a deliberate count with completed clicks and intervals, use the click checker.
Common questions
What do the wheel units mean?
The browser reports wheel deltas in CSS pixels, lines, or pages. The displayed unit comes from that event; a value is not physical wheel travel. Horizontal deltas require a device or gesture that exposes them.
Does this measure input latency or polling rate?
No. The page sees events after the device, OS, and browser have processed them. It has no synchronized hardware measurement and does not expose all low-level mouse data.