How to use the Laptop Keyboard Test
- Choose your keyboard layout
- Press every key — tested keys turn green
- Keys that stay grey after pressing need fixing or replacing
About this tool
Test every key on your laptop keyboard online — function row, arrow keys and the number pad found on 15 and 17 inch laptops. Laptop Keyboard Test is part of WebToolNest's collection of free web & device. It works instantly in your browser with no account and no installation.
How to test a laptop keyboard
The tester is already set to a standard Windows laptop layout. If your laptop has a number pad (most 15.6″ and 17″ models), tick Numeric keypad. Then press every key from the top-left to the bottom-right and watch them turn green. The counter at the top tells you how many keys are left.
What the colours mean
- Green — the key sent a signal to your computer. It works.
- Blue — the key is being held down right now. A key that stays blue after you let go is stuck.
- Red outline — shown when you click “Highlight untested keys”: keys you have not pressed yet.
- Dashed — Fn and Touch ID are handled inside the laptop and are never visible to any website. Test Fn through its shortcuts instead (Fn + brightness or volume).
Fn and the top row
On most new laptops the top row does media actions (volume, brightness) by default, and you hold Fn to get F1–F12. If F-keys don't light up here, press them together with Fn, or toggle Fn Lock — usually Fn + Esc, or a setting in the BIOS called “Function key behavior” or “Action keys mode”.
A key does not light up — what next?
- Rule out software first. Restart, then test again. Check that Filter Keys / Sticky Keys (Windows Settings → Accessibility → Keyboard) are off.
- Plug in a USB keyboard and test it here. If the external keyboard works, the laptop keyboard hardware is at fault, not Windows.
- Clean it. Turn the laptop off, tilt it, and blow compressed air under the dead key in short bursts. Crumbs and dust cause most “dead” or “sticky” keys.
- Reinstall the driver. Device Manager → Keyboards → right-click the keyboard → Uninstall device, then restart. Windows reinstalls it automatically.
- If one key or one whole row is still dead, the keyboard (or its ribbon cable) needs replacing. On most laptops the keyboard is a separate, inexpensive part.
Frequently asked questions
Is the Laptop Keyboard Test free to use?
Yes. Laptop Keyboard Test on WebToolNest is completely free, with no sign-up, no watermark and no daily limits.
Is my data stored?
No. Most checks run entirely in your browser. Tools that must contact a network service — such as the speed test or IP lookup — only send what is needed to get the result, and we never store it.
Does Laptop Keyboard Test work on mobile phones?
Yes. WebToolNest works in any modern browser on Android, iPhone, iPad, Windows, Mac and Linux. There is nothing to install.