Press any key on your keyboard. Working keys turn green. Press Reset to test again.
A dead key rarely shows up until you're already mid-sentence, mid-form, or mid-game. This keyboard tester online lets you press every key on your board and watch it light up on screen, so you know exactly which ones are working before it matters.
There's nothing to install. Just start typing on your physical keyboard, and each key highlights the moment it registers.
Start pressing keys on your physical keyboard. Each one lights up green on the on-screen layout as soon as it registers, and the counters at the top track how many unique keys you've tested against the total key count.
If a key you pressed never lights up, that's your answer — it isn't registering. Press Reset at any point to clear your progress and run through the whole board again, which is useful after a spill, a repair, or when confirming a brand-new keyboard before you rely on it.
This tool confirms whether each individual key sends a signal at all. It won't measure how fast that signal arrives — for that, use the keyboard latency tester — but it will immediately reveal dead keys, keys that only respond when pressed hard, and keys that were never wired correctly at the factory.
This tester maps a full-size layout, including the number pad, function row, and navigation cluster. That means it works whether you're testing a compact 60% keyboard — in which case several keys on screen simply won't apply to you — or a full 104-key board, where every key shown should eventually get pressed.
If you're testing a smaller layout and some on-screen keys never light up, that's expected. Focus on the keys your physical keyboard actually has.
Dust, crumbs, or a stray hair under a keycap can prevent a switch from making full contact. Gently blowing compressed air around the key or carefully removing the keycap to check underneath often resolves this.
Occasionally a key works in one app but not another due to a keyboard shortcut conflict. Testing it here, in a plain browser tab, rules that possibility out.
If a key only fails to register while other keys are held down at the same time, you may be running into your keyboard's rollover limit rather than a broken key. Try pressing it on its own to confirm.
On Windows, an outdated or corrupted driver can occasionally cause a key to stop responding even though the hardware is fine. Microsoft's keyboard troubleshooting guide covers how to check and update drivers.
For wireless keyboards, a weak connection can cause dropped or delayed keystrokes. Testing with a different USB port, or switching to a wired connection if available, helps rule out a connectivity issue rather than a hardware fault.
Test immediately after unboxing new hardware, after any liquid spill even if it seems to have dried fine, after a deep clean where keycaps were removed, or any time typing feels inconsistent. It only takes a minute, and catching a dead key early is far less frustrating than discovering it mid-document.
Once every key checks out, the typing speed test is a good next stop to see how the keyboard actually performs under real typing.
Does this test measure typing speed?
No — this tool only confirms whether each key registers. For speed and accuracy, use the typing speed test.
Can I test a compact or 60% keyboard here?
Yes. The layout shown is full-size, so keys your compact board doesn't have simply won't be pressed — that's normal and doesn't indicate a problem.
Why does a key work sometimes but not always?
Intermittent response usually points to a loose connection under the keycap or debris affecting the switch. It's less commonly a rollover limitation, which tends to happen only with specific key combinations.
Does this tool check for typing latency or input delay?
No. This test only confirms a key sends a signal. For delay between a keypress and when it registers, use the keyboard latency tester.
Do I need to install anything to run this test?
No installation is required. The test runs directly in your browser and detects keypresses as you type.
If you're troubleshooting your setup, it's worth checking your other devices while you're at it. Try the webcam test to confirm your camera, the microphone test to check your mic, the speaker test for audio output, or the mouse test to check buttons, scroll, and cursor tracking.
Take a minute to run through every key above and confirm your keyboard is working exactly the way it should.