Keyboard test online. Every key, and how many at once.
Press keys and watch them light up on a map. Hold several to see how many your keyboard registers at once. Nothing is installed and nothing typed is kept.
One check
- Keyboard
One check after another, with your progress along the top and a plain verdict on each. Nothing you show the camera or say into the microphone leaves this page.
In short
Keyboard test: the answer first
A keyboard test lights each key on a map as you press it, counts how many keys register together in a rollover step, and flags any key still down when you finish. Nothing you type is kept.
Reading your result
- A key that never lights
- Try it in another program. If it is dead everywhere, the switch, trace or keyboard has failed; on a laptop the keyboard is a replacement part.
- Rollover, not a fault
- If only two or three keys register together, that is the keyboard's design limit. Gaming keyboards advertise N-key rollover for this.
- Stuck at the end
- A key still reported down is a stuck switch or a missed release. Cleaning under the keycap is the first step.
What it measures
Measured here, not assumed.
- Every key
- A key that never lights up is a dead switch, a broken trace or a keyboard the system has partly disabled.
- Rollover
- A step asks you to hold listed groups, A S D F, then Shift Q W E R, then six letters, and counts how many register at once. Every key arriving is n-key rollover for that group; fewer is a rollover limit or ghosting, reported by the number.
- Stuck keys
- A key still reported as down when you finish, which is a stuck switch or a missed key release.
If it fails
The usual failures, and what fixes each.
- A key does not light up
- Try it in another program to rule out the browser. If it is dead everywhere, on a laptop the keyboard is a replacement part; on a desktop, a new keyboard.
- A key repeats or sticks
- Pull the keycap and clean under it; crumbs and spills are the usual cause. If it still sticks, the switch has failed.
- Only two or three keys register together
- That is the keyboard's rollover limit, not a fault. It matters for games and chords, not typing. Gaming keyboards advertise N-key rollover for this.
Where a browser stops
What it cannot tell you.
- Keys outside the map, such as media keys and the number pad, which still register in the last-key readout.
- Whether a key is physically worn; only that it registers.
- Latency of the switch itself.
Privacy
Nothing leaves this page.
The camera and microphone are read on this page and stopped as soon as they have been measured. The clip you can play back lives in the browser's memory and is discarded when you leave. The location check discards the position. The internet test sends random bytes to this site and nothing else. The result is stored nowhere unless you ask for it by email, and then only the fact that an email was sent is kept.
Questions
Keyboard test, answered
- How do I test my keyboard online?
- Open the test above, click inside it, and press keys. Each one lights up as it registers. Then hold the listed key groups together for the rollover figure.
- What is keyboard ghosting?
- When holding certain keys together makes the keyboard report a key you did not press, or drop one you did. It happens past the keyboard's rollover limit, usually two or three keys on basic keyboards. A browser sees only the keys that arrive, so the test reports a dropped key as ghosting or a rollover limit, without telling the two apart.
- Is anything I type recorded?
- No. Key presses are counted on this page and never sent anywhere.
- My keyboard types a letter twice. Is that this test?
- Double letters are chatter, a bouncing switch. The keyboard chatter test counts them per key.
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