Keyboard Test — Check Every Key on Your Keyboard
Press any key and watch it light up. Work through the whole board to find dead, stuck or double-firing keys — no downloads, nothing to install.
Click here, then press any key
What is a keyboard test?
A keyboard test shows a picture of a keyboard and lights up each key as you press it, so you can prove that every single key on your board actually works. It is the quickest way to check a new keyboard out of the box, confirm a second-hand board before you pay for it, or hunt down that one key that only fails when you are mid-sentence. Because the test reads the key signal itself — not the character that appears — it also separates real hardware faults from software quirks like the wrong input language.
How to check your keyboard
Click the keyboard panel above so it turns on, then simply start pressing keys. Each key lights up while you hold it and stays green once it has registered, and the counter keeps score — 78 keys make a full pass of the main board. Go row by row so none get skipped, and give the hard-working keys extra attention: Space, Enter, Backspace, Shift and the WASD cluster wear out first on most boards. If a key only lights up when you press it harder than the others, that is an early warning sign — healthy switches fire with a normal press, every time.
Why do keys stop working?
Most dead keys come down to four causes. Dust and crumbs work their way under the keycaps and block the switch — the classic reason a key fails after months at a desk. Membrane and budget mechanical switches simply wear out, especially on keys hit thousands of times a day. Liquid spills corrode contacts or make keys sticky and unreliable. And occasionally the keyboard is fine but the connection is not: a loose cable, a flat wireless battery or a confused Bluetooth pairing can drop keys at random.
A key failed — what to try first
Start with the free fixes. Turn the board upside down and shake out the debris, then clean around the dead key with compressed air. Try a different USB port, and if you can, plug the keyboard into another computer — that instantly tells you whether the fault travels with the keyboard. For a single worn key on a mechanical board, the switch itself can often be swapped. If several keys in one area are dead, the board is usually at the end of its life. While you decide, our typing speed test and spacebar speed test will show you how much the faulty key is costing you, and the double click test does the same job for a suspect mouse.
Results depend on your device, browser and connection. This test is a practical hardware check, not a diagnostic service — if a key matters for work, a repair shop can confirm the fault.
Frequently asked questions
How does this keyboard test work?
Click the keyboard panel to switch it on, then press any key on your physical keyboard. The matching key on screen lights up while you hold it and stays marked green once it has been tested. The counter at the top shows how many keys you have checked, so you can work through the whole board in under a minute.
A key lights up but types the wrong character — is it broken?
Usually not. If the on-screen key lights up, the switch itself works — a wrong character almost always means your operating system is using a different keyboard layout or input language than the one printed on your keys (a common example is US vs UK English). Check the language settings on your computer.
Can I test a laptop keyboard?
Yes — this test works with any keyboard: laptop, desktop, wired or wireless. Laptop boards simply have fewer keys (often no separate numpad). On many laptops the F-keys share duty with brightness and volume controls, so you may need to hold the Fn key to test F1–F12 as function keys.
What about numpad and media keys?
The on-screen board shows the main block that most typing uses. Numpad, media and other extra keys still register here — they count in your total presses and show in the Last key readout, they just do not have a cap on screen to light up.
Is anything I type sent to a server?
No. The test runs entirely in your browser. Nothing you press is recorded, stored or sent anywhere — close the tab and it is gone.