How to use the keyboard tester
Just start typing. Every key you press lights up on the layout, and keys you've already tested stay green. Go row by row so you don't miss any. When you're done, any key that's still white either isn't working or isn't sending a signal the browser can see.
Under the keyboard you'll see details for the last key you pressed: the character, the key code, and whether it was the left or right version of a key such as Shift or Ctrl. That's handy for checking that both Shift keys work, or that a remapped key sends what you expect.
What results mean
- A key never lights up: the switch may be dead, dirty or disconnected. Try pressing it a few times firmly.
- A key stays colored after you let go: it may be stuck. Look for crumbs or a sticky spill under the keycap.
- One press shows up twice when typing: the switch may be chattering. This is common on worn mechanical switches.
- The wrong key lights up: your keyboard layout setting may not match the physical keyboard.
Fixes worth trying first
- Turn the keyboard upside down and tap it gently, or use compressed air between the keys.
- For a wireless keyboard, replace or charge the batteries and re-pair it.
- Try a different USB port, and avoid unpowered hubs.
- Check the keyboard layout in your system language settings.
Testing your mouse too? Try the mouse test, which also catches double-click problems.
Frequently asked questions
Why don't Fn, Print Screen or the Windows key show up?
Some keys are handled by your operating system or keyboard firmware before the browser ever sees them. Fn usually never reaches any software. That's normal and doesn't mean the key is broken.
Can I test a laptop keyboard?
Yes. The tester works with laptop keyboards, USB keyboards and wireless or Bluetooth keyboards. Laptop keyboards may not have every key on the layout, such as a separate Insert key.
How do I know if a key is stuck?
A stuck key stays highlighted in color after you let go of it. If that happens, check under the keycap for debris.
Does the keyboard tester record what I type?
No. Key presses are only shown on this page and aren't saved or sent anywhere.
Sources
Results depend on your device, browser and settings. Nothing you test on this page is uploaded or stored.
Spotted a mistake? Email corrections@gadgetior.com and we'll check it.