Keyboard Test
Check every key on your keyboard registers. Press any key and watch it light up on an on-screen layout, with its key code and label shown. Spot keys that do nothing, keys that stick, and combinations that drop because of ghosting. Works for laptops and external keyboards alike.
- No app to install
- 100% free
- Nothing is recorded
- No sign-up, no email
- Works on any device
Press keys to light them up. Green outline means a key has been tested; solid means it is held down now.
How to use it
- 1
Click into the tester
Click the keyboard area so it has focus, then start pressing keys. Each press lights the matching key on screen.
- 2
Press every key
Work across the whole keyboard, including modifiers, function and arrow keys. A key that never lights is not registering.
- 3
Check for sticking and ghosting
A key that stays lit after release may be sticking. Hold several keys at once to check your keyboard registers them together.
When it comes in handy
Buying used or second-hand
Run through every key on a used laptop or keyboard before you commit, so a dead key does not surprise you later.
After a spill or repair
Confirm all keys still work after cleaning, a spill or a replacement, without opening a document and hunting.
Gaming key rollover
See how many keys your keyboard can report at once, which decides whether fast multi-key inputs land in games.
Instant & 100% private — nothing is recorded
The test runs right here in your browser. When it needs your camera or microphone, the feed is shown to you and nothing else: never uploaded, never recorded to a server, never stored. There is no sign-up and no email wall, and most tests keep working with no connection at all.
Frequently asked questions
- A key does nothing on screen — is it broken?
- Probably, but rule out the simple causes first. Make sure the tester has focus by clicking it, and check the key is not a special function key the operating system intercepts before the browser sees it. If an ordinary letter or number never lights here and fails in other apps too, the key itself is the problem.
- What is keyboard ghosting and how do I test for it?
- Ghosting is when a keyboard cannot report certain combinations of keys pressed at the same time, so some presses are dropped. Hold three or more keys together and watch how many light up. Cheaper keyboards drop keys in busy combinations; keyboards rated for full rollover report them all.
- Why do some keys show an unexpected code?
- The code reflects the physical key, which can differ from the printed legend if your layout is set to another language or region in your operating system. The key still works; the label simply maps to a different character. Switching your system layout back will line the codes up with the legends.
- Is my camera, microphone or data sent anywhere?
- No. Every test runs locally in your browser on your own device. When a test needs your camera or microphone, the feed is shown to you and nothing else: it is never uploaded, never recorded to a server, and never stored. Close the tab and it is gone. You can confirm it by disconnecting from the internet after the page loads; the tests still work.