A keyboard tester lets you press every key and see it light up on an on-screen keyboard, so you know exactly which keys work.
How to test your keyboard
- Click inside the box above so it can catch what you type.
- Press each key on your keyboard, one at a time or several together, and watch it light up in the box above.
- Check the box above for the key code and how many keys it is counting as held down at once.
Why run a laptop keyboard test
- You just bought a laptop and want a laptop keyboard test done before the return window closes.
- A key feels stiff or does nothing when pressed, and you want to confirm keyboard not working before booking a repair.
- You play games or type fast and want a key rollover test to see how many keys the keyboard can register at the same time.
- You are buying a second hand laptop and want to check every key before paying.
What the keyboard tester shows you
Each key you press lights up on the on-screen layout, so you can see which keys respond and which stay dark. The box above also shows the key code for the last key pressed, and how many keys are registering at once — the key test that matters for gaming and fast typing.
Good to know
This tool runs in your browser, with no file to upload, no install and no sign-up. It works with any keyboard, including one built into a laptop. Some laptops send media or brightness keys as special codes, so those may show up differently in the box above, which is expected.
Questions people ask
What does a keyboard tester actually check?
A keyboard tester checks whether each key sends a signal when pressed. Press a key and watch the box above — if it lights up, the key works; if not, it needs a closer look.
How do I run a keyboard test online?
Click into the box above and start pressing keys. Every key you press lights up on screen along with its key code, so you do not need to install anything.
What is a key rollover test?
It checks how many keys your keyboard can register at once when you press several together. The box above shows the live count as you hold keys down, which matters for gaming and fast typing.
My keyboard not working on one key, how do I confirm it?
Press that key in the box above. If nothing lights up and no key code appears, the key is not sending a signal, which usually means a hardware fault.
Can I do a laptop keyboard test before returning a new laptop?
Yes. Press every key, including the number pad and function keys if you have them, and check each lights up before the return window closes.
Do I need an account to use this keyboard tester?
No. The keyboard tester runs in your browser, there is no account, no watermark and nothing to install, and it does not take or store any file.
Updated 25 September 2026.