Scroll Wheel Test
Count scroll wheel events on your own device, split into scroll up and scroll down.
Runs in your browser. Nothing is uploaded — your input is processed on this device and discarded when you close the tab.
Scroll Wheel Test
How to use this tool
- Enter your values in the fields above.
- Press Generate to see the result.
- Use Load sample to try the worked example, Copy result to copy it, or Clear to start again.
Worked example
Two scroll-down events and one scroll-up event give down 2, up 1 and 3 events in total.
What this tool does not do / Limits
This tests the scroll wheel on the device you are using right now, in this browser. It cannot test a different or remote device, and it cannot diagnose hardware faults.
Frequently asked questions
Does this test a wheel I do not have here?
No. It only counts scroll events on the device you open this page on.
Why do counts update as I scroll?
A live listener counts each scroll event on the page as it happens.
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