Keyboard tester
Test every key on your keyboard online: each key that works lights up on the keyboard layout.
How to useTest your keyboard.
Press the keys one by one. The ones that work turn blue.
Press any key.
Available in: 
Keyboard tester: what it is for
The keyboard test shows a keyboard on the screen. Each key that works lights up, so it's easy to spot the ones that are faulty. Every key you press also appears in the history with its name and code.
It works with laptop, USB and wireless keyboards.
How to use
- Press the keys one by one.
- See which ones light up.
- The ones that don't light up may be faulty.
When to use it
- Testing a new or used keyboard.
- A laptop after a liquid spill.
- Finding out the code of a key.
Frequently asked questions
A key doesn't light up. Is it broken?
Probably. Test it in another program, such as Notepad, to confirm. On a laptop, dirt under the key is a common cause.
Some keys don't light up even though they work
Keys like Print Screen, Fn and some media keys are handled by the system and never reach the browser.
Does it work with a US keyboard?
Yes. The drawing follows the Brazilian ABNT2 standard, but any key you press appears in the history with its name and code.
Is it really free?
Yes, 100% free. No sign-up, no subscription and no usage limits. All Tools123 are free.