Free browser-based mouse button diagnostic
Test Your Mouse Buttons Online
Use the interactive test below to check whether your left mouse button, middle mouse button, and right mouse button are being detected correctly by your browser. The test records button presses, releases, clicks, and the most recent mouse input without requiring software or downloads.
Mouse Button Test
Click inside the testing area using each mouse button.
How to Use the Mouse Button Test
- Move your mouse pointer into the testing area.
- Click the left mouse button several times.
- Press the middle mouse button or scroll wheel.
- Click the right mouse button.
- Check the counters to see whether each input was detected.
- Use the Reset Test button if you want to start a fresh test.
What Does This Mouse Button Test Check?
This tool checks whether your browser receives input from the three standard mouse buttons. It can help identify obvious input problems such as a mouse button that does not register, registers inconsistently, or appears to stop responding.
- Left mouse button: checks primary click input.
- Middle mouse button: checks the mouse wheel click.
- Right mouse button: checks secondary click input.
- Total clicks: shows the combined detected button activity.
How to Tell If Your Mouse Button Is Working
A working button should increase its corresponding counter every time the button is pressed and released inside the testing area. If one button consistently fails while the others respond normally, the problem may be related to the mouse, connection, operating-system settings, browser behavior, or the specific application where the problem occurs.
Mouse Button Not Working? Try These Checks
- Reconnect a wired mouse or reconnect the wireless receiver.
- Replace or recharge the battery if you use a wireless mouse.
- Try another USB port.
- Test the mouse on another computer if possible.
- Check whether the problem happens only in one application.
- Clean around the affected mouse button carefully.
- Restart the computer and test again.
If you specifically have a problem with repeated clicks, use our Double Click Test. For right-button problems, use the Right Click Test. For overall mouse diagnostics, use the Mouse Diagnostic Test.
Mouse Button Test vs. Click Speed Test
A mouse button test answers a basic hardware-input question: is the button being detected? A click speed test measures how quickly repeated clicks can be produced during a timed test. If your goal is to diagnose a button rather than measure clicking performance, this page is the better starting point.
You can continue to our Click Speed Test after confirming that your buttons are responding correctly.
About This Browser-Based Test
MouseDiag uses browser mouse events to observe input generated by your mouse. Because the test runs in a web browser, it is designed as a practical diagnostic tool rather than laboratory-grade electrical hardware testing. Browser, operating system, device, and application behavior can affect what is reported.
Frequently Asked Questions
Can I test the left mouse button online?
Yes. Click inside the testing area with the left mouse button and the left-click counter should increase.
Can I test the right mouse button?
Yes. The test captures right-button input inside the testing area and adds it to the right-click counter.
Can I test the middle mouse button?
Yes. Press the mouse wheel or middle button inside the testing area to test middle-button input.
Does this mouse button test require a download?
No. The test runs directly in your browser.
Why is one mouse button not registering?
If one button repeatedly fails while other buttons work, test another USB port, another browser, or another computer to determine whether the issue follows the mouse or the current system.