Step by step
- Press every key here.
- Open the mouse test.
- Click every button and scroll both ways.
At a glance
| Device | What to check | Where |
|---|---|---|
| Keyboard | Dead, stuck or doubled keys, rollover | This page |
| Mouse buttons | Left, right, middle, side buttons | Mouse test |
| Mouse wheel | Scroll up and down, wheel click | Mouse test |
Related questions
Why doesn't clicking show here?
This test reads only the keyboard.
My mouse double-clicks by itself. Why?
A worn switch; the mouse test shows unwanted double clicks.
Do these tests work on a laptop touchpad?
The mouse test reads touchpad clicks and scrolling too.
More questions: keyboard test
- A key on your laptop not working: how to test and fix it
- Laptop keyboard not working: what to do first
- Keyboard typing by itself: how to fix it
- Keyboard typing numbers instead of letters: how to fix it
- Keyboard typing wrong characters: @ and " swapped, # turned into £
- Keyboard typing double letters: how to fix it
- Keyboard locked: how to unlock it
- Mechanical keyboard key not working: how to fix it
- USB keyboard not working on your PC: how to fix it
- How to test a keyboard without a computer: use your phone
- How to test a keyboard: online, mechanical, wireless, MacBook and BIOS
- Keyboard test for gaming: ghosting and key rollover
- How to test keyboard latency and polling rate
- How to test your keyboard on Windows 10 and 11
- How to test a MacBook keyboard
- Keyboard tester for 60%, 75% and TKL keyboards without a numpad
- Keyboard test for sticky keys: stuck key or Sticky Keys setting?
- Keyboard test on iPhone and Android
Updated November 14, 2026.