Skip to content
Toolspire

Device Tests

Keyboard Tester

Keyboard Tester is part of Toolspire and is ready as soon as this page loads. Press each key once. It lights up on the keyboard, and a key that stays down after you let go is flagged. Nothing you type is saved or uploaded.

Runs in this tabFreeNo account

On this page

What you can do here

A key that lights up

Pressed keys are filled in. Keys you have already tried stay tinted, so you can see what you still have not pressed.

Stuck-key warning

If a key is still down after four seconds, the page says so.

Repeat counter

Holding a key on purpose increments Repeats, which is also how you spot a key that chatters.

Physical codes

The log shows codes such as KeyA and ShiftLeft, which stay stable across layouts.

The sequence

How to test a keyboard

  1. 1

    Click the page

    Make sure the cursor is not in a text field. Those swallow keys on purpose.

  2. 2

    Press every key once

    Each key should light up and then go dark when you release it.

  3. 3

    Watch for a key that stays lit

    A key that is still highlighted after you have let go, and that the warning names after four seconds, is sticking.

  4. 4

    Try a modifier

    Shift, Ctrl, Alt and the Windows or Command key each have their own place on the diagram.

Worth knowing

  • Keyboard Tester on Toolspire: draws a full keyboard and lights each key as the browser reports it, including function keys, modifiers and arrows.
  • A key held for more than 4 seconds is called out, which is how a stuck key usually shows up.
  • Counts auto-repeat events separately from real presses, so a chatty key is visible.
  • Keeps a short list of the latest keys and their KeyboardEvent.code, the physical key rather than the character.
  • Runs entirely in the page. Keystrokes are not stored and not sent anywhere. Leaving the tab releases every “held” key.

A key does nothing

  • The cursor is in a field — click the grey page background and try again.
  • A browser shortcut — Ctrl, Alt and Command combinations are left alone so the test does not steal refresh or tab switching. Press the key on its own.
  • Fn on a laptop — function keys may be media keys until you hold Fn, or the other way round. That is a firmware setting, not a dead key.
  • The switch — spill, dust or a worn switch can kill one key. If the same key fails in another app, the keyboard is the problem.

Code and character

The diagram uses the physical position (KeyQ), not the letter your layout prints. On an AZERTY keyboard the key in the Q position still reports KeyQ while the character is A. That is why the log shows both.

FAQ

Questions about Keyboard Tester

Where does Keyboard Tester run?

Keyboard Tester runs in this tab on Toolspire. What you type or drop in is not sent to us and is not stored on a server.

How do I find a stuck key?

Press and release the suspect key. If it stays lit, and the amber line names it after about four seconds, the keyboard is still sending “down” with no “up”.

Are my keystrokes uploaded or saved?

No. The page only remembers the last few keys in memory so it can draw them. Closing the tab clears that, and nothing is sent to a server.

Why did Ctrl and Alt not light the letter keys?

Shortcuts are ignored so the test does not block refresh, find, or tab switching. Press Ctrl or Alt on its own — those keys are on the bottom row.

Does it work with a non-US layout?

Yes. Lighting follows the physical key. The character you see in the status line follows your layout, so an AZERTY or Hindi layout still maps onto the same diagram.

My function keys change the volume instead. Is that a fault?

No. Laptops often make F1–F12 into media keys. Hold Fn, or switch the Fn lock in the BIOS or keyboard settings, and test them again.

Keep going

Related tools

Mouse TesterNewClick, right-click, scroll and double-click in the pad. The test counts each button and shows where the pointer is. Open Mouse Tester on Toolspire.Device TestsSpeaker TesterNewSpeaker Tester on Toolspire. Play a tone in the left speaker, the right, or both, then sweep from bass to treble.Device TestsTouch Screen TestNewTouch Screen Test on Toolspire: Touch the corners and the centre, and see every finger the screen reports. Multi-touch stays in this tab and is not uploaded.Device TestsMic TesterNewMic Tester on Toolspire. Test your microphone online: a live sound level, waveform and spectrum, record and play back a clip, and fix a mic that is muted.Device TestsWebcam TesterNewWebcam Tester on Toolspire. Test your webcam online: see the live picture, resolution, megapixels and frame rate, take a photo or record a clip.Device TestsDead Pixel TestNewDead Pixel Test on Toolspire. Fill the screen with solid colours and a fine grid to spot dead, stuck or bright pixels. Nothing about your display is uploaded.Device Tests

Open the full directory

Last updated Report a problem or suggest a feature