Free Mouse Scroll Test & Online Mouse Tester

You probably use your scroll wheel hundreds of times a day without thinking about it. But when something goes wrong skipping, reversing, or scrolling too fast, it gets annoying fast. A quick scroll test can tell you if the problem is real or if it's just a software setting.

It's also handy when you're shopping for a new mouse. Run the test with your current mouse, then try the new one. You'll see the difference in scroll smoothness and speed right away. No guesswork, just numbers.

Head over to the Mouse Scroll Test page, choose how long you want to test (5 to 30 seconds), and start scrolling. The tool does the rest tracking every scroll event and showing you the results when time is up. No setup, no accounts, no learning curve.

Each test on this site is designed the same way: pick your settings, run the test, and get clear results. Your top scores are remembered in your browser so you can track your improvement over time.

Once you've checked your scroll wheel, there's plenty more to explore. Curious how fast you can click? Try the CPS Test. Want to make sure all your mouse buttons work? The Click Test has you covered. Noticed your mouse double-clicking on its own? The Double Click Test can help you figure that out.

If you're into gaming, the Accuracy Test and Jitter Click Test are built for you. Designers and video editors will find the Drag Test useful for checking drag precision. And if you want to know how responsive your mouse really is, the Polling Rate Test gives you an estimate of your mouse's Hz.

For the most accurate results, close heavy apps running in the background, they can slow your browser down and mess with the numbers. Make sure your scroll wheel is clean and your mouse is sitting on a flat, stable surface.

Don't judge your scroll speed on just one try. Run the test a few times and look at the average. If you're comparing two mice, test them back-to-back under the same conditions. Your best scores save automatically, so you can always come back later and try again.

Every test on this site is 100% free. No accounts, no paywalls, no data collection. Your scores are saved in your browser and never leave your device. We built this for people who just want to test their mouse and get on with their day.

The site works on any modern browser, supports light and dark modes, and loads fast on any device. Whether you're on a gaming PC or a work laptop, everything just works.

Your scroll wheel might look simple, but there's a small piece of engineering inside it. Most mice use a rotary encoder, a tiny component that turns the physical motion of the wheel into electrical pulses your computer can read. Each click you feel, those little detents, is one tick of the encoder.

Some encoders are mechanical, with metal contacts that brush against each other. Others are optical, using a light beam and a slotted disk for cleaner, longer-lasting performance. When the encoder spins, your operating system turns those pulses into scroll events, and the browser reads them through the standard wheel event. Our mouse scroll test listens to that exact same event, so what you see on the screen is what the browser actually receives, no smoothing, no guesswork.

If something feels off with your scroll wheel, you're not alone. These are the most common issues people run into, and what usually causes them:

Scroll skipping or jumping, the page jumps two or three lines instead of one. Usually a sign of dust inside the encoder or a worn contact.

Ghost scrolling, the page scrolls on its own without you touching the wheel. Often caused by a dirty encoder sending phantom pulses, or by a stuck driver.

Scroll wheel feels loose or too stiff, the resistance has changed. Could be a mechanical wear issue or, on premium mice, a free-spin clutch that needs resetting.

Horizontal scroll not working, your mouse may not support tilt scrolling, or the driver for it isn't installed. Test it on our scroll test to see if any horizontal events come through.

Scroll lag in specific apps, if scrolling lags only in Chrome, Excel, or one game, it's usually an app setting, not your mouse. Confirm by running the scroll test outside that app first.

Gamers, competitive players run our CPS test, jitter click test, and polling rate test before tournaments to make sure their mouse is hitting full performance. Even a small dip in polling rate can cost you a round.

Office workers and writers, if you spend the day in long documents, spreadsheets, or code editors, a smooth scroll wheel matters more than you think. Our scroll test helps you spot a bad mouse before it ruins your workflow.

Mouse reviewers and shoppers, testing two mice back to back is the easiest way to feel the difference. Run the same test on each mouse, compare the numbers, and pick the one that fits you. No marketing fluff, just data.

Every test on this site uses the browser's built-in event system. Scroll tests listen to the wheel event, click tests use mousedown and mouseup, and accuracy and drag tests rely on pointermove. We pair these with performance.now(), a high-resolution timer accurate down to the microsecond, so your results aren't just ballpark, they reflect what your browser actually saw.

Everything happens locally on your device. We don't upload your scroll data, click counts, or mouse movements to any server. There's no analytics on your test results, no tracking pixels inside the test area, and no need to sign in. Your best scores are kept in your browser's local storage so you can come back later and try to beat them.

A little maintenance keeps your mouse working like new for years. Start with the scroll wheel: a quick blast of compressed air around the gap on either side of the wheel clears out the dust that causes most scroll problems. Do this every few months and you'll avoid the skipping and ghost scrolling that wears people down.

Keep your mouse drivers up to date by checking your manufacturer's support page once or twice a year. For wired mice, try a different USB port if behavior gets weird, sometimes the port itself is the problem. For wireless mice, a fresh battery or a recharge fixes more issues than people expect. After any fix, run the scroll test or click test again to confirm everything is back to normal. It only takes a few seconds and it tells you for sure whether the problem is gone.