π²οΈ Mouse Button Detection
Click any mouse button to see the corresponding key area light up in real time.
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π Scroll Wheel Test
β‘ Double-Click Speed Test
βοΈ Mouse Trail Visualization
Move your mouse over the canvas below to visualize the movement trail. Click "Clear Trail" to reset.
π Approximate DPI Estimator
Move your mouse steadily for 10cm on your desk while holding the button. The tool estimates approximate DPI from screen pixel displacement.
Place your mouse here, move 10cm, then release the button:
π How to Use
- Open this page in Chrome, Edge or Firefox with your mouse connected β nothing needs installing.
- Click the left, middle and right buttons one by one. Each key lights up in the Mouse Button Detection panel when the click registers.
- Hover over the Scroll Wheel Test area and roll the wheel up and down; the direction indicators light up as each step is detected.
- Click the "Double-Click Me" button twice quickly to measure your double-click interval.
- Move the mouse across the trail canvas to check the movement is smooth, then hold "Move 10cm" to estimate your DPI.
- If a button, the wheel or the trail misbehaves, note which module failed β that points to the faulty part.
This online mouse tester is a pure browser-based application that requires no software installation. Just open the page in your browser and start testing. Here is a detailed guide for each feature module.
Mouse Button Detection: Click the left, right, middle, or side buttons on your mouse. The corresponding key area at the top of the page will highlight in real time. If a button does not respond, it may be defective. Note that some browsers suppress side button (forward/back) events for security reasons, which is expected behavior.
Scroll Wheel Test: Hover over the scroll test area and scroll your wheel. Two directional indicators show scroll up and scroll down, lighting up as you scroll. Repeatedly scrolling can help confirm if the wheel has reverse scrolling, skipping, or sticking issues.
Double-Click Speed Test: Click the "Double-Click Me" button. The system records the interval between two consecutive clicks. Windows defaults to a 500ms double-click interval; completing a double-click within 300ms is considered fast. Recent test history shows your last 10 attempts.
Mouse Trail Visualization: Move your mouse over the canvas area and the tool draws your movement trail in real time. Jagged lines, visible gaps, or irregular jumps may indicate a faulty sensor or an unsuitable mouse surface.
DPI Estimator: Hold down the "Hold & Move 10cm" button, move your mouse steadily about 10 centimeters across your desk, then release. The tool calculates an approximate DPI value from screen pixel displacement and your screen DPI setting. This is an estimate; use a professional tool for precise DPI measurement.
π― Use Cases
The mouse tester fits a variety of scenarios, helping users quickly diagnose mouse hardware status.
- Buying a used mouse: Before purchasing a second-hand mouse, quickly test whether buttons are responsive and the scroll wheel is smooth to avoid buying a defective unit.
- Pre-game check: Competitive games demand high mouse precision. Use the tool before matches to confirm your mouse is in top condition and avoid mid-game failures.
- Office equipment maintenance: IT administrators can batch-check office mice and replace aging devices proactively.
- Troubleshooting: When a mouse feels "off," use the tool to pinpoint whether the issue is with buttons, the scroll wheel, or the sensor.
- DPI matching: After switching mice or monitors, estimate DPI to adjust sensitivity settings in games or design software.
π¬ Extended Knowledge
Mouse Button Encoding: In web standards, mouse buttons are encoded via the button property: 0 = left, 1 = middle, 2 = right. Side buttons typically map to 3 and 4, but behavior varies across browsers and operating systems. Some browsers suppress side button events for security reasons.
DPI vs CPI: DPI (Dots Per Inch) originated in the printing industry and was later borrowed to describe mouse sensitivity. CPI (Counts Per Inch) is the technically accurate term for sensor sampling rate, representing how many data points the sensor captures per inch of physical movement. The two terms are often used interchangeably in everyday conversation.
Why trails look jagged: Jagged mouse trails usually stem from three causes: low sensor resolution (a low-DPI mouse on a high-resolution screen), an unsuitable surface (e.g., glass desks cannot reflect enough light for the sensor), or a low USB polling rate (125Hz vs 1000Hz produces more visible gaps in the trail).
β Frequently Asked Questions
What mouse issues can this tool detect?
It can detect faulty left/right/middle buttons, unresponsive scroll wheels, malfunctioning side buttons, inconsistent double-click timing, and movement drift or tracking interruptions.
Do I need to install software to use this mouse tester?
No. This tool runs entirely in your browser with no server uploads required. Just open the page and start testing immediately.
Why are my side buttons not detected?
Some browsers restrict or suppress side button (forward/back) events for security reasons. Try using Chrome or Edge, and disable any extensions that may intercept mouse button events.
What is considered a good double-click speed?
Windows defaults to a 500ms double-click interval. A double-click completed within 300ms is considered fast. The tool records and displays your actual timing for each attempt.
How does mouse trail visualization help?
The trail shows movement smoothness and precision in real time. Visible jagged lines, gaps, or irregular jumps may indicate a faulty sensor or an unsuitable surface.
How does the DPI estimator work?
Move your mouse a known physical distance (e.g., 10cm) while holding the test button. The tool calculates approximate DPI based on screen pixel displacement and your screen DPI setting.
Can I use this tool on a touch screen device?
Partially. Touch screens support click and movement events, but scroll wheel and side button tests require a physical mouse. Use a mouse for the full experience.
How to test a mouse?
Open the page, then click each mouse button while watching the Button Detection panel light up. Scroll inside the wheel area to check both directions, move the cursor over the canvas to inspect the movement trail, and double-click the test button to measure your click timing. No software is needed β everything runs in your browser.
What is a double-click test?
It measures the gap between two consecutive clicks. A fast double-click lands under about 300ms, while Windows treats clicks up to 500ms apart as a double-click by default. The test also catches "double-click chatter", where one physical press registers as two clicks because of a worn switch.
How do I know if my mouse is broken?
Warning signs include a button that never lights up, a scroll wheel that skips a direction or scrolls the wrong way, a trail with gaps or sharp jumps, and a single click that registers twice. If the same problem appears on another computer, the mouse itself is faulty.
What is a mouse polling rate test?
Polling rate is how many times per second your mouse reports its position to the computer β typically 125Hz, 500Hz or 1000Hz. A higher rate gives smoother tracking. You can spot a low polling rate here: if the movement trail shows regular gaps or stair-stepping even when you move slowly, the mouse is probably reporting at 125Hz. To confirm the exact rate, check the mouse's software or the manufacturer's spec sheet.