Keyboard Checker
Test your keyboard by seeing pressed keys light up.
About Keyboard Checker
Press any key and watch it light up on a virtual keyboard, with the key name and code for every press. Spot dead switches, stuck keys, and broken modifiers on a new or remapped keyboard in seconds.
What this tool does
Press any key on your keyboard and it lights up on the virtual keyboard layout. The tool captures the key code, key name, and event details for every keypress. It's a quick way to verify that every key on your keyboard is registering correctly.
When you'd use this
- Testing a new mechanical keyboard to make sure every switch works
- Diagnosing stuck or unresponsive keys
- Checking that modifier keys (Shift, Ctrl, Alt) register properly
- Verifying keyboard layouts after remapping keys
- Testing custom keyboard firmware
How keyboard events work
When you press a key, the browser fires three events: keydown (key pressed), keypress (character input, deprecated), and keyup (key released). Each event includes a key (the character), code (the physical key), and modifier state (whether Shift, Ctrl, Alt, or Meta were held). This tool shows you exactly what your browser receives for each keypress.