π Scroll Wheel Test
Scroll the mouse wheel in this area
β¬οΈ Scroll Up
β¬οΈ Scroll Down
Scroll log will appear here...
β‘ Double-Click Speed Test
Click the button below to start
Click any mouse button to see the corresponding key area light up in real time.
Move your mouse over the canvas below to visualize the movement trail. Click "Clear Trail" to reset.
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:
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.
The mouse tester fits a variety of scenarios, helping users quickly diagnose mouse hardware status.
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).
It can detect faulty left/right/middle buttons, unresponsive scroll wheels, malfunctioning side buttons, inconsistent double-click timing, and movement drift or tracking interruptions.
No. This tool runs entirely in your browser with no server uploads required. Just open the page and start testing immediately.
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.
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.
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.
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.
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.