Online Mouse Tester

1. Move the pointer inside the test area and watch the live position update.
2. Press each button, including the wheel click, and check that it appears in the log.
3. Scroll the wheel up and down and confirm the direction is reported correctly.
4. Look for gaps, repeated events or buttons that never appear in the log.

Every event the page receives is listed with its type. A button that shows nothing may have a switch problem, but it can also be a button the browser does not report, such as Back and Forward on some systems. Test with another browser or the manufacturer software before deciding the mouse is faulty.

Because the tool shows browser events, it reflects the whole chain: mouse, driver, operating system and browser. It cannot see the sensor directly.

When your mouse is working normally, the log should show a clear pattern:

• The position updates smoothly as you move the pointer, without long pauses or sudden jumps.
• Each press of a button creates a press and a matching release. One physical click should not appear twice.
• Scrolling the wheel one notch at a time creates a steady series of wheel events that all point in the same direction.

Red flags are a button press with no release, two presses for one click, wheel events that briefly reverse direction, or position updates that stop for a moment while you keep moving. Any of these can have a software cause, so repeat the test before concluding that the mouse is faulty.

• Pointer stutters: try a different USB port, connect the receiver directly instead of through a hub, and check the surface. Wireless interference from other devices can also cause gaps.
• Button missing from the log: see the button tester and try another browser, because some browsers handle Back and Forward themselves.
• Wheel reverses or skips: use the scroll tester to count reversals, and clean the wheel area.
• Repeated clicks: check the interval with the double-click tester.
• Cursor feels too fast or slow: that is a settings question, not a fault. Read how to check mouse DPI on Windows or on Mac.

Testing a new mouse is easiest when you run each of the tools once and keep notes. Any problem that appears in several tools and on another computer is worth a warranty claim.

Why is my side button not showing?

Many browsers do not deliver Back and Forward button events to web pages, or the driver may remap them. That is a browser limitation, not always a hardware fault.

Can this test mouse DPI?

No. Use the DPI analyzer to estimate DPI.

Does it work with a trackpad?

Yes, but trackpads do not have a wheel or side buttons, so those parts will not register.