Free online keyboard tester
Press a key on your keyboard. See it light up instantly.
Sound off
Synthesized mechanical key sounds. Choose Off for silent testing.
Swipe across the keyboard to see every key. Use a physical keyboard to test.
US QWERTY labels · Windows key = Command on Mac. Some system shortcuts may open outside this page.
A quick check, before you replace it
Make sense of your keyboard test
Check letters, numbers, modifiers, arrow keys, and the number pad directly in your browser. The display shows the events your browser receives, helping you spot keys that need a closer look.
How do I test my keyboard?
Keep this page focused and press each physical key once. A blue key is being pressed; green means the browser received the key. Use Reset test to start again. You do not need to install an app or create an account.
Does it work with my language or keyboard?
The tester reads physical key codes, while the diagram shows US QWERTY labels. On AZERTY, QWERTZ, and other language layouts, the printed letters may differ. Extra regional keys may not appear in this diagram. Use a physical keyboard; a phone’s on-screen keyboard may not send the same events.
Why does the Windows key open the Start menu?
Windows, Command, and some function-key shortcuts are handled by your operating system or browser. This page cannot always prevent those actions or receive those keys. An unlit key alone does not prove that your keyboard is broken.
Can I check multiple keys at once?
Hold a small combination, such as A, S, and D, and watch which keys light up together. Release and try another combination. Browser shortcuts can interfere, so this is a practical check of received key events, not a hardware certification.
What if a key does not light up?
Click an empty area of the tester and try again. Check the connection, try another USB port, and test in a text editor or another browser. If the key fails in multiple apps, follow the troubleshooting guide below.