Check mouse and keyboard input in a browser
Use repeatable observations to separate browser behavior from possible device problems.
A browser test shows events delivered to a web page. It does not inspect the switch, cable, wireless link, driver, or operating system directly. Treat an unexpected result as a clue you can reproduce, rather than a hardware diagnosis.
Make a controlled comparison
- Focus the test page and put the pointer inside its test area. Note your browser, device, and connection type.
- Try a small, repeatable sequence: ten separated clicks, five scroll movements in one direction, or one press and release of each ordinary letter key.
- Repeat the same sequence. Write down what failed and whether it failed in the same way.
- Compare in another ordinary application or with another available input device. Change one condition at a time so the comparison tells you something.
Mouse buttons and double clicks
In the button tester, press and release each button separately. Some side-button actions may be intercepted by the browser or system. An unmarked button means the page did not observe the expected event; it does not prove the button is broken.
The double-click test flags event intervals below your selected threshold. Two deliberate fast clicks can trigger the same flag as an unintended repeat. Compare slow single clicks and ordinary double clicks at the same threshold. Record the threshold with your observations.
Scroll direction is more useful than a notch count
The scroll test counts browser events. Smooth scrolling and trackpad gestures need not correspond one-to-one with mechanical wheel notches. Note unexpected direction changes while moving steadily in one direction, then repeat in a normal scrolling page. An event count alone cannot measure wheel condition.
Keyboard shortcuts can leave the page
The keyboard tester can show ordinary key events and held combinations that reach it. System shortcuts, Fn keys, focus changes, and keyboard layouts can affect which events appear. Use ordinary letter combinations first; avoid shortcuts that close the tab or change applications. If an issue repeats across applications, use the device maker’s troubleshooting guidance before changing hardware.
Click-speed scores are useful for comparing your own repeated attempts under similar conditions. This site has no population benchmark or anti-cheat verification, so a score does not establish a device’s quality or a person’s ability.