Keyboard Test Online
Press any key on your physical keyboard and see it light up instantly. Spot dead, stuck or double-registering keys in seconds.
Press any key on your keyboard to test it.
What this keyboard tester checks
When a key highlights in teal as you press it and stays marked afterward, your operating system and browser are receiving clean key events from that switch. If a key fails to light up or flickers twice on a single tap (key chatter), that key may have dust under the cap or a worn switch.
Testing rollover and modifier keys
Hold multiple keys down together - such as Shift, Ctrl, Alt and letter keys - to check whether your laptop or mechanical keyboard registers simultaneous presses cleanly without ghosting.
Frequently asked questions
Why didn't a key light up when I pressed it?
First check whether Num Lock or Fn Lock is active on your keyboard, or whether a browser shortcut intercepted the key. Keys like Win, Print Screen or hardware Fn keys are sometimes captured by the operating system before reaching the browser.
Does this work for laptop and mechanical keyboards?
Yes. It works with USB, Bluetooth, laptop and mechanical keyboards on Windows, macOS, Linux and Chromebook.
How do I clear the tested keys?
Click Reset test above the keyboard at any time to clear all highlighted keys and start fresh.