Free Mouse Button Test for Left, Right, Middle, Back, Forward, and Hold
This mouse button test visualizes primary and auxiliary buttons, tracks down/up events, measures hold duration, records the buttons bitmask, and logs event order locally.
Run the live browser test
| Time | Event | Button | Bitmask | Hold |
|---|
12 practical features in this mouse button test
Left button detection
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Middle button detection
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Right button detection
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Back button detection
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Forward button detection
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Pointerdown and pointerup counts
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Per-button hold duration
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Current buttons bitmask
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Event sequence log
Built into this page as an interactive or diagnostic capability, not just a static explanation.
Simultaneous button state
Built into this page as an interactive or diagnostic capability, not just a static explanation.
All-buttons checklist challenge
Built into this page as an interactive or diagnostic capability, not just a static explanation.
CSV export and local history
Built into this page as an interactive or diagnostic capability, not just a static explanation.
How to read the diagnostic signal
| Signal | Useful interpretation | Important limitation |
|---|---|---|
| Stable repeat result | More useful for comparison than a single isolated sample | Still depends on the current browser, OS, and device state |
| Large change after one controlled adjustment | Good clue that the changed variable matters | Correlation is not always proof of root cause |
| Missing or inconsistent browser event | Useful troubleshooting evidence | Does not electrically inspect hardware components |
| Exported session summary | Helps compare before/after changes | Only as good as the test conditions you record |
Worked example: run the same test twice, change one relevant setting, then repeat it. A consistent change across repeated runs is more informative than a single isolated number.
Six short lessons for better testing
Control one variable
Keep device settings, browser zoom, and test mode constant before comparing results.
Repeat the measurement
One run can be noisy. Repeat the same test and look for a stable pattern.
Separate browser from hardware
Browser events are useful diagnostics, but they do not expose every firmware or electrical detail.
Use the right metric
Choose timing, accuracy, count, support, or geometry metrics that match the problem you are investigating.
Record context
Save the device, connection type, relevant settings, and test condition with any result you compare later.
Interpret, do not overclaim
Treat the page as a practical diagnostic aid rather than a laboratory certification instrument.
Complete the diagnostic workflow
Three-question diagnostic quiz
Recent saved milestones on this device
Continue without a dead end
Free Mouse Button Test for Left, Right, Middle, Back, Forward, and Hold: FAQ
Which button numbers does the browser use?+
Typical mappings are 0 left, 1 middle, 2 right, 3 back, and 4 forward, although device behavior can vary.
Why do back or forward buttons navigate the browser?+
Some browsers map auxiliary buttons to navigation. The test pad attempts to prevent default behavior, but browser or operating-system behavior can still vary.
What is the buttons bitmask?+
The buttons property represents currently pressed buttons as bits, allowing simultaneous-button states to be observed.
Can this test click force?+
No. Standard mouse button events do not provide physical switch force.
Can this prove a button is defective?+
It can show missing or inconsistent browser-visible events, which is useful evidence, but it does not electrically diagnose the switch or controller board.
Use the result responsibly
This tool reports what a browser can observe or calculate in the current environment. Firmware, drivers, operating-system processing, permissions, transport, display timing, audio hardware, device design, and browser implementation can add behavior that this page cannot isolate.
External technical reference: MDN: MouseEvent.button ↗.