Keyboard Test

What this keyboard test checks

This online keyboard test shows a full keyboard on screen and lights up each key as you press it. It recognises keys by their physical position, so it works with any language layout: QWERTY, AZERTY, QWERTZ and others. In Chrome and Edge, the keys even show the characters of your own layout.

While you type, the test also measures:

• Keys tested: how many keys of the chosen layout have responded at least once.
• Most keys at once: the largest number of keys held down together, also called key rollover.
• Chatter: a key that registers a second press almost immediately after being released, a common fault of worn mechanical switches.
• Keys per second and hold time: how fast you type and how long the last key was held.
• Lock keys: whether Caps Lock, Num Lock and Scroll Lock are on.

A separate area below the keyboard checks your mouse buttons (left, middle, right, back and forward) and the scroll wheel in both directions.

How to test your keyboard

1. Choose your keyboard size and layout above the test: full size, tenkeyless (no number pad) or compact, and ANSI (US) or ISO (European, with a tall Enter key).
2. Press every key once. Keys turn from grey to blue while held, then stay highlighted once they work. The counter shows how many keys are left.
3. Hold several keys together, for example the keys you use in games, to see how many your keyboard registers at once.
4. Type normally for a while. A key that turns orange registered a double press: that is chatter.
5. Test the mouse in its area: click each button and scroll up and down.
6. Save the result to compare it later, or copy its link to share it.

While the keyboard area is active, every key is captured, including Tab and the function keys, so your browser does not react to them. Press Esc twice quickly to leave the keyboard area.

How to read your results

A key never lights up

First make sure the key is part of the layout you selected. If it is, press it firmly several times. A key that never responds may have a dirty or broken switch, or a damaged membrane on laptops. Some keys are also reserved by your operating system (see troubleshooting).

Chatter

Chatter means the keyboard sent two presses when you pressed once, which produces doubled letters when you type. It usually comes from dust or wear inside a mechanical switch. Blow compressed air under the keycap and test again. If the same key keeps chattering, the switch may need replacing. Many gaming keyboards also have a “debounce” setting in their software that can reduce it.

Most keys at once (rollover)

Office and laptop keyboards often register only 2 to 6 keys at once in some combinations, and extra keys are ignored. Gaming keyboards with “n-key rollover” register every key. A value of 6 or more is enough for most games. Note that your operating system and USB connection can also limit the count.

Troubleshooting

The Windows, Command or Fn key does not register

The Fn key is handled inside the keyboard itself and is never sent to the computer, so no website can detect it. The Windows key and some shortcuts (such as Alt+Tab or Print Screen on some systems) are intercepted by the operating system before the browser sees them.

Media and volume keys are missing

Media keys are not part of the standard layout shown here. When your browser receives them, they still appear in the keystroke list.

The layout does not match my keyboard

Keys are shown by position. If your keyboard is ISO (tall Enter key and an extra key next to the left Shift), choose ISO. On laptops, some keys share a position with the Fn layer and can only be reached with Fn.

Keys stay lit after I switch windows

The test releases held keys as soon as the page loses focus. If a key still looks held, press it once more.

Frequently asked questions

What is the difference between ghosting and rollover?

Rollover is how many keys a keyboard can register at the same time. Ghosting is when a keyboard reports a key you did not press, or drops one you did, because of how its keys are wired. Holding several keys in this test shows both: missing keys and keys that light up without being pressed.

Does this test work with AZERTY or QWERTZ keyboards?

Yes. The test uses the physical position of each key, so every layout works. Chrome and Edge also show your own characters on the keys.

Can I test a laptop keyboard?

Yes. Choose the compact or tenkeyless size depending on your laptop, and remember that keys reached only with Fn cannot be tested individually.

Is what I type recorded or sent anywhere?

No. Key presses are processed in your browser and are never sent to TestrHub. Only a summary (counts and the names of keys that chattered) is kept if you save a result, and it stays in your browser unless you share its link.

Why do the hold time and speed differ from my keyboard’s specifications?

The browser measures when it receives each key, after your keyboard, USB connection and operating system. Its clock is also slightly rounded for privacy. These values describe your typing, not the keyboard’s internal response time.