What the tool does, how to run it, and what to expect from the result.
Scroll inside the box: every tick is counted, up and down, plus left and right tilt on wheels that support it. When a scroll in one direction produces a tick the other way within 120 ms, it is counted as a wrong-direction tick. A few can come from your finger; a steady stream while scrolling one way means the encoder is dirty or worn, the usual cause of a page that jumps back while you scroll.
A quick way to understand who this helps, what it solves, and where it connects next.
Gamers, PC builders and anyone checking a device before a warranty claim.
Using the scroll wheel test without installing anything or signing up.
Short answers for the questions people usually have before trying a utility like this.
Blow compressed air around the wheel while scrolling it, which often clears dust from the encoder. If the jumps return, the encoder is worn and needs replacing.
Mice with a notched wheel report whole lines; touchpads and free-spinning wheels report pixels. The result shows which your device sends.
Nearby tools from the catalog that fit the same job or workflow.
Find a mouse that double-clicks by itself
Find a mouse that double-clicks by itself. Free, in your browser.
Test mouse buttons, wheel and polling rate
Test mouse buttons, wheel and polling rate. Free, in your browser.
Clicks per second in 5 seconds
Click for 5 seconds, get your clicks-per-second score and a verdict.
Test JS regex locally
Test one JavaScript regex pattern against pasted text and inspect matches and groups locally.
Army one-site tape test (AD 2023-11)
Army one-site tape test (AD 2023-11). Free, instant, in your browser.
Find your attachment style
A free 20-question quiz on adult attachment style: secure, anxious, avoidant, or fearful. In your browser.
Cleanor puts these tools in one app: compress and convert images, video, and audio, work with PDFs, and scan text right on your device. Plus free up storage and clear inbox clutter with Email Cleaner. Start with a free trial.
Scroll the wheel inside the box, slowly in one direction, then fast.
Every tick so far went the way you scrolled. A healthy wheel never jumps backwards.