Mouse Scroll Test
Test your mouse scroll wheel for skipping, reversing, or inconsistent scrolling. Detect scroll wheel hardware issues.
How does this test work?
A mouse scroll test detects every scroll event from your mouse wheel and shows the direction and delta values. If scrolling skips steps, reverses direction, or feels inconsistent, your scroll wheel encoder may be failing.
How to use the Mouse Scroll Test
Open the Mouse Scroll Test on any device with a modern browser — desktop, laptop, tablet, or phone. No downloads, plugins, or signup required. The tool loads instantly and works in Chrome, Firefox, Safari, Edge, and other Chromium-based browsers.
Follow the on-screen instructions to run the test. Results are displayed immediately in your browser. You can repeat the test as many times as needed. For the most accurate results, close other tabs and applications to reduce interference.
Privacy: This test runs entirely in your browser using standard web APIs. No data is collected, uploaded, or stored on any server. Camera, microphone, keyboard, mouse, and controller inputs are processed locally and never leave your device. DeviceKit does not use analytics cookies or tracking scripts.
Browser note: Some hardware values are estimated because browsers limit direct access to device hardware for security and privacy reasons. Results may vary slightly between browsers and operating systems. For the most reliable measurements, use an up-to-date version of Chrome or Edge on a desktop computer.
Frequently Asked Questions
Why does my scroll wheel skip?+
Scroll wheel skipping is usually caused by dust inside the scroll encoder or a worn encoder wheel. Compressed air can sometimes fix it.