Mouse Button Test: Test Every Button, Scroll & Side Clicks

The Mouse Button Test is a browser-based utility that checks every button on your mouse, including left, right, middle, back, forward, and the scroll wheel. It provides a live 3D visual of your mouse, with real-time highlights for every button press, so you instantly see which input was detected. Each click or scroll event is timestamped and logged, showing the exact MouseEvent.button code as reported by your browser and operating system.

Beyond simple button checks, the tool detects switch chatter, rapid, unwanted double-clicks that signal a failing switch. It measures hold durations and estimates input latency using the browser's animation frame timing. You can export all diagnostics as JSON or CSV files for further analysis or sharing with support teams. The tool supports both standard 2-button mice and more advanced 5-button models, making it flexible for almost any hardware from budget to high-end gaming mice like the Logitech G Pro X Superlight or Razer DeathAdder V3 Pro.

Start by connecting the mouse you want to test. Open the Mouse Button Test page in any modern browser like Chrome, Firefox, or Edge. The tool automatically detects your mouse and loads a 3D visual on screen.

Click each button, left, right, middle (scroll wheel press), side buttons (back and forward), and scroll up or down. As you interact, the matching button will highlight in real time. The event log below the visual updates instantly, recording the precise time, button code, and action (press, release, scroll).

Try holding buttons to see if the duration is tracked correctly. If you notice repeated entries for a single press, your mouse might be chattering. Use the scroll wheel slowly and quickly to check if all movements register. After testing, use the export button to save your event log and diagnostics for later review or support requests.

If your mouse has only two buttons, switch to 2-button mode for a cleaner interface. For gaming or productivity mice with more buttons, use the 5-button mode to cover all inputs.

The tool displays multiple types of results to help you pinpoint issues:

Button Highlights: Each button lights up when pressed, confirming the browser received the input. If a press does not highlight, the click was not detected by your OS or browser.

Event Log: Every detected input is timestamped and labeled with MouseEvent.button, showing the underlying code from the browser. Double-check that each press and release pair is recorded, and that scroll events appear for every wheel movement.

Counters: The tool tallies total presses for each button and scroll direction. This helps spot missed or repeated events during rapid testing.

Chatter Detection: If a button triggers multiple events within 50ms, the tool flags this as chatter. Frequent chatter entries suggest a hardware fault, often seen on worn-out mice like older Logitech G502s or generic office mice.

Hold Duration: This measures how long each button is held down, useful for diagnosing stuck switches or confirming the OS reports accurate timing.

Click Latency: The tool uses the browser's requestAnimationFrame to estimate how quickly your clicks are detected. Expect some variance, as browser timing is not as precise as lab-grade USB polling. Large, erratic latency spikes may hint at software interference or USB issues.

Diagnostics Panel: A summary view shows all key stats and any detected problems. You can export this data as JSON or CSV for analysis, warranty claims, or technical support.

Double-clicking When Single Clicking: This is the most frequent mouse fault, where a left or right button triggers two or more events for every press. The tool flags this as chatter, so you spot it instantly. Common in aging mice like the Razer DeathAdder Elite or Logitech G703.

Missed Clicks or Unresponsive Buttons: If you click a button and the tool does not highlight it, your OS or mouse hardware likely failed to register the input. This can be due to worn switches, USB cable problems, or a defective PCB.

Faulty Scroll Wheels: If scrolling up and down only sometimes registers, or you see multiple scroll events per tick, there may be a mechanical or encoder issue. The event log will show exactly what was detected.

Stuck Buttons: If the hold duration keeps running after you let go, or the diagnostic panel reports a stuck state, your switch may be physically jammed or electrically faulty.

Side Button Mapping Issues: Some mice, including the Corsair Sabre RGB Pro or Logitech MX Master, have programmable side buttons. If the browser does not detect these, check your mouse software or OS settings.

Inconsistent Latency: Big jumps in estimated click latency could point to USB polling problems, resource-heavy background apps, or browser performance issues, especially on older systems or laptops running on battery.

Scenario 1: Diagnosing Double-Click Chatter on a Logitech G Pro Wireless After a year of daily use, your G Pro Wireless starts double-clicking every time you left-click. Using the test, you see the left button triggers two events within 30ms. The chatter detection panel flags this instantly and the event log proves it's a hardware issue. You export the log for an RMA claim.

Scenario 2: Verifying Scroll Wheel Issues on a Razer Basilisk V3 You notice your scroll wheel sometimes skips or jumps two lines. The test shows multiple rapid scroll events when you scroll slowly, and missed events at faster speeds. The diagnostics panel suggests the encoder is faulty. You use this data to confirm the issue before contacting support.

Scenario 3: Testing Side Button Mapping on a Corsair Dark Core RGB Pro You remap the back and forward buttons in iCUE, but they no longer work in the browser. The tool shows no events for these buttons. After resetting profiles, the buttons now show MouseEvent.button 3 and 4, confirming the OS is receiving them again.

Scenario 4: Comparing Latency on Wired vs Wireless Mice You test a wired Logitech G203 and a wireless Glorious Model O. The click latency values are lower and more consistent with the wired mouse, while the wireless model shows slightly higher and more variable latency. This helps you decide which is better for competitive gaming.

Scenario 5: Checking for Stuck Buttons on a Cheap Office Mouse The left button sometimes stays pressed after a click. The hold duration counter keeps running even after you release. Diagnostics report a stuck state, confirming a mechanical fault in the switch.

Scenario 6: Testing Mouse Performance on Different Operating Systems You run the test on Windows 11 and Ubuntu Linux with the same mouse. On Linux, the middle mouse button sometimes fails to register. The event log and counters prove this OS-specific detection issue, helping you troubleshoot further.

Use a Modern Browser: Chrome, Firefox, or Edge provide the most accurate event reporting. Outdated browsers may miss or delay events, especially for high-frequency inputs.

Disable Mouse Software Remapping: Logitech G HUB, Razer Synapse, and Corsair iCUE can remap or block buttons. For pure hardware testing, close these apps or reset profiles to default.

Test on a Stable Surface: Wobbly desks or uneven mouse pads can cause accidental presses or missed events. Use a flat, stable surface for best results.

Unplug Other USB Devices: High USB bus load or power-hungry peripherals (like RGB keyboards or external drives) can cause input lag or missed signals. Test with minimal devices connected if you suspect issues.

Repeat Tests: Try each button multiple times, both slow and rapid presses. For scroll wheels, test at different speeds and directions.

Compare Across Ports: If issues appear, try a different USB port or switch between USB 2.0 and 3.0. Some motherboards or laptops throttle certain ports to save power.

Check OS Input Settings: Windows Mouse Properties or Linux input settings can affect detection. Reset to defaults if inputs are not registering.

Export and Review Logs: Use the JSON or CSV export for detailed troubleshooting, warranty claims, or sharing with support teams. Logs are especially useful if the issue is intermittent.

Browser-based tests like this are ideal for quick diagnostics, cross-platform use, and sharing results without installing anything. They work on Windows, macOS, and Linux, and support most modern mice, from basic Dell OEM models to gaming mice like the SteelSeries Rival 5.

However, browser tests have limits. Input detection depends on your OS and browser, so some advanced features (like high-frequency polling or debounce timing) are only approximate. Scroll wheel events may be filtered or smoothed by the browser, and certain side buttons might not be accessible if your mouse software remaps them or if the OS does not pass those events to the browser.

For deep analysis, use dedicated desktop software like MouseTester or Switch Hitter on Windows, or event viewers on Linux like 'evtest'. These can access raw USB data, show debounce times, and measure true polling rates (125Hz, 500Hz, 1000Hz). However, they require downloads and may not be available on all platforms.

Use the browser tool for fast checks, troubleshooting on unfamiliar systems, or when you need to export results. For competitive gaming, hardware modding, or warranty disputes, supplement browser testing with dedicated software to confirm findings.

The Mouse Button Test is a powerful, browser-based utility for diagnosing mouse hardware issues. It checks every button, scroll, and side click, with real-time 3D feedback and detailed event logs. The tool flags double-click chatter, missed inputs, stuck buttons, and scroll wheel problems, helping you identify faults quickly.

While browser-based testing is fast and cross-platform, it is limited by OS and browser input handling. For most users, this tool gives all the data needed for troubleshooting, warranty claims, or routine checks. For advanced analysis or lab-grade precision, use it alongside dedicated desktop tools.

Whether you are troubleshooting a double-clicking Logitech G Pro, verifying new side buttons on a Corsair Dark Core, or just making sure your office mouse is working, the Mouse Button Test delivers actionable diagnostics with zero setup.