Mouse Scroll Test

Test scroll wheel direction, steps, and smoothness.

Scroll here

Use the mouse wheel or trackpad over this panel.

How to use

Test scroll wheel direction, steps, and smoothness. Free in your browser. No install required.

Free in the browser

No signup. This page is the tool. Search the catalog when you want a mouse.

FAQ

+ What does the scroll test check?

Scroll direction, step count, and whether notches arrive one at a time.

+ Why do I see extra steps?

A loose wheel encoder can fire extra notches. Dust and a worn wheel do the same.

+ Does a free-spin wheel look different?

Yes. Free-spin modes send a burst of steps. A notched wheel should send one step per click.

+ Can I test horizontal scroll?

The page reads the wheel events the browser sends. A tilt-wheel shows up when the browser reports horizontal scroll.

+ Do I need an account?

No. The tool runs in your browser. There is no signup, and the result shows on this page.