About Mouse Tester
We built Mouse Tester because we kept running into the same frustrating situation: something felt off with a mouse, and there was no quick, honest way to check it without downloading sketchy software or ordering a replacement and hoping for the best.
That felt wrong. A browser already knows when you click a button. It knows when the scroll wheel fires. It knows if a single press produced two events instead of one. All of that information was sitting right there. It just needed a tool that actually showed it to you clearly.
So we built one.
Who We Are
We are a small team of developers and everyday computer users. No corporate backing. No investor pressure to monetize your data. Just people who spend a lot of time at a desk and get tired of mouse problems being harder to diagnose than they need to be.
Some of us came from gaming backgrounds where a double-click at the wrong moment costs a round. Some of us came from general productivity work, where a scroll wheel jumping three lines instead of one causes real frustration every single day. All of us shared the same belief: the first step before replacing hardware should always be a two-minute test, not a purchase.
What We Actually Built
Mouse Tester runs entirely in your browser. There is nothing to install, no account to create, and no time limit on how long you can use it.
Button Testing
Every button on your mouse, left click, right click, middle click, back, and forward registers in real time. You can see exactly how many times each one fired and whether any button is double-registering from a single press.
Scroll Wheel Testing
The scroll wheel test logs every individual notch of movement. If your encoder is wearing out and firing twice per notch, you will see it immediately in the event history. That kind of fault gets misread as a browser bug or a slow computer for months before someone checks it properly.
Input History Log
Every click and scroll event produces a colored entry in the history log. Green for left click. Purple for right. Yellow for middle. The log does not disappear between clicks; it builds up so you can spot patterns rather than reacting to a single event.
We made all of this free because mouse testing is not a premium feature. It is just information your computer already has.
Why We Keep It Free
Paid mouse testing software exists. We have used most of it. Some of it is genuinely good. But none of it should be necessary just to check whether a button is working.
The people who need this tool most are the ones who are not sure yet whether they have a hardware problem. Asking them to pay before they know the answer is not fair. So we do not do that.
Mouse Tester will always be free to use. We cover basic operating costs through unobtrusive advertising. You will not find pop-ups, autoplay videos, or anything that gets in the way of just running a test. We follow all platform advertising policies, and the content on this site is kept factual and useful, not padded to hit a word count.
If you want to understand how we handle your data and what we collect when you visit, our Privacy Policy covers everything in plain language.
Our Honest Take on Mouse Testing
We will say something that most mouse testing sites avoid saying directly: a lot of people replace their mouse when they do not need to.
A double-click fault is usually a worn switch. Switches can be cleaned or swapped without replacing the whole mouse. A scroll wheel jumping multiple lines per notch is almost always a dying encoder — the same story. A cursor that stutters on certain surfaces is often the surface, not the sensor.
None of that means every mouse is worth saving. Sometimes the hardware is genuinely done. But the only way to know is to test it, not guess at it.
That is what this tool is for. Two minutes of testing gives you a real answer. Then you can decide what to do with it.
Get in Touch
If something on the site is broken, if a button is not registering correctly in the tool itself, or if you have a suggestion for something we should add, we want to hear it.
We are a small team, so response times are not instant, but we do actually read what people send us. If you found a genuine bug, we will fix it. If you have an idea that makes the tool more useful for real people with real mouse problems, we take that seriously.
You can reach us through the contact page linked in the footer.