Keyboard test
Press every key — see which ones work.
Click here or Tab into this box, then press keys. Esc lets Tab leave; Enter or a click starts again.
Last key–
Code–
Keys tested0 / 87
Held now0
Most at once0
Nothing leaves your device
This tool runs entirely in your browser. What you type, play or record here stays on your device: nothing is uploaded or saved on a server.
Example
Example: checking a full-size US keyboard key by key
A second-hand 104-key US keyboard, number pad included. The page picks US QWERTY from its language, and draws the number pad on screens at least 1024 px wide (or press Number pad). Keys tested then reads 0 / 104.
- Click the test area and press every key row by row, keeping Esc for last: each lights while held and turns green once it has worked.
- Watch Last key and Code: the J key shows “j” and KeyJ. A key that lights another key, or nothing, is the faulty one.
- Hold W, A, S, D and Space together and read Most at once: 5 means all five were reported together.
| Layout | Keys drawn | With the number pad |
|---|---|---|
| US QWERTY (ANSI) | 87 | 104 |
| UK QWERTY (ISO) | 88 | 105 |
| French AZERTY | 88 | 105 |
| German QWERTZ | 88 | 105 |
| Japanese JIS | 91 | 108 |
Keys tested 104 / 104 means every key on the drawing worked. The UK drawing has one key more, between left Shift and Z. Keys your keyboard lacks simply stay grey; only a key you have that never lights is a fault.
How it works
- Click the test area (or Tab into it) and choose your keyboard layout if it isn’t picked automatically.
- Press every key: it lights while held and turns green once it has worked. The last key and its code are shown.
- Hold several keys together to see how many register at once; keys that never light are the ones to check.
Frequently asked questions
- How do I know if a key is broken?
- Press it in the test area: a working key lights up and turns green. If nothing happens, or another key lights instead, the key or the keyboard’s matrix is faulty — try it on another computer to rule out the system.
- What is key rollover?
- How many keys the keyboard reports when pressed together. Many office keyboards manage only 2 or 3 in some combinations (“ghosting”); gaming keyboards often report all of them (n-key rollover). Hold keys down one by one and watch “Most at once”.
- Why doesn’t the Fn key light up?
- Fn is handled inside the keyboard and never reaches the browser. The system also keeps a few combinations to itself, such as Alt+F4, Ctrl+W or the Windows key.
- Which layouts are there?
- US, UK, French AZERTY, German QWERTZ, Spanish, Italian, Turkish Q and F, Brazilian ABNT2, Japanese JIS (with かな on the keys) and Korean 2-set (with Hangul). The key position comes from the physical key, so any layout can be tested on any drawing.
- Why do some keys stay grey on my laptop?
- The drawing is a full keyboard: 87 keys for US QWERTY, 104 with the number pad. Keys your laptop doesn’t have, such as Scroll Lock, Pause, Insert, the menu key or the number pad, can’t be pressed, so they stay grey. Hide the number pad with its button to take it out of the count.
- Why does the Code show a different letter from my key?
- Code names the key’s position on a US keyboard, whatever your layout prints on it. On a French AZERTY keyboard the key marked A types “a” but its code is KeyQ, because it sits where Q is on a US keyboard. That is how each key lights in the right place on any drawing.
- Is anything recorded?
- No. It runs in your browser; nothing you type or click is sent anywhere.