Mouse Wheel Tester
Inspect vertical and horizontal wheel deltas within your browser without diagnosing hardware.
Play Mouse Wheel Tester
Scroll over the test pad and watch recorded delta values and direction.
How to play Mouse Wheel Tester
Scroll over the test pad and watch recorded delta values and direction.
How results are calculated
Wheel-event count and delta totals.
Accuracy, limitations and fair comparisons
Browser scheduling, device and input differences influence results; recreational only. The challenge runs in your current browser session; compare repeated attempts on the same device for a more useful personal reference.
Questions and answers
Is Mouse Wheel Tester free?
Yes. This activity is free and does not require registration.
Does this test upload my input or score?
No. Gameplay and optional history storage run in your browser on this device; exporting a result requires your own action.
What is the measured result?
Wheel-event count and delta totals.
Can the result be treated as a medical or hardware diagnosis?
No. Browser scheduling, device and input differences influence results; recreational only.
Related free challenges
See which key events your browser detects while testing an attached keyboard, including modifiers and repeat signals.
Play free →Mouse Button TesterInspect browser-visible left, middle and right mouse events and wheel direction within a dedicated area.
Play free →Mouse Drag TesterMeasure pointer travel distance during drag gestures on a test surface.
Play free →