Test all keyboard keys for input responsiveness, key press latency (ms), and maximum simultaneous key presses (Anti-Ghosting / NKRO) interactively.
No keys pressed yet. Press any key on your keyboard to begin testing.
Press all keys on your keyboard sequentially; registered keys turn green.
Press multiple keys simultaneously to test your keyboard's Anti-Ghosting (NKRO) capability.
Inspect the event log on the right to diagnose key chatter (double-clicking) or sticky keys.
Click 'Reset Test' to clear recorded keys and begin a fresh diagnostic session.
Ghosting occurs when certain key combinations fail to register simultaneously due to matrix wiring limits. N-Key Rollover (NKRO) keyboards can register all keys pressed at once without conflict.
Key latency measures the time elapsed between keydown and keyup in milliseconds. It helps identify sticky switches, chatter, or slow bounce times.