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Scroll Test

Professional mouse wheel detection tool.

Wheel Status Monitor

Not Triggered
Activated
Triggered

Mouse Detection Area

Move mouse into this area for mouse function detection

Scroll History Records

No scroll records

Start scrolling mouse wheel to view records

Wheel scrolling jumps or reverses?

Compare slow and fast wheel movement in this tester. App-only issues usually come from app settings, while system-wide issues are often encoder wear, dust, or device configuration.

Professional mouse wheel detection tool that helps users quickly diagnose mouse wheel sensitivity and direction recognition. Through real-time scroll testing, it can detect wheel stutter, rollback abnormalities, and similar issues, while keeping a history log for troubleshooting.
• Real-time bidirectional scroll detection with up and down recognition. • Scroll frequency counting and timestamp recording. • Smart debounce processing to reduce accidental noise. • Saves the latest 10 scroll history records. • One-click reset of detection data. • Adaptive dark and light theme support.
1. Move the mouse to the test area. 2. Scroll the mouse wheel freely. 3. Observe real-time scroll direction recognition. 4. Review the history log. 5. Reset test data if abnormal. Tip: You can hover the area to lock page scrolling during focused testing.
Built on the Wheel Event API, this tool determines scroll direction by listening to wheel events and reading deltaY values. It uses Vue reactivity for real-time updates and lightweight styling for accessible visual feedback.
Office equipment maintenance
Q: Why disable page scrolling? A: It prevents the browser or page from moving while you are trying to measure wheel input. Q: Do trackpads work here? A: Yes. Trackpad scroll usually maps to wheel events and will be detected, but it may feel smoother, with smaller deltas, than a mouse wheel. Q: Why do the values jump or feel inconsistent? A: Some devices send different step sizes depending on speed, OS settings, or high-resolution wheel mode. Background CPU load can also affect timing. Q: How do I test horizontal scrolling? A: Use a wheel that supports tilt or side-scroll, or a touchpad two-finger horizontal gesture. Look for deltaX and left-right direction. Q: Is anything uploaded? A: No. Events are processed locally in your browser.