Keyboard & N-Key Rollover (NKRO) Matrix
Diagnose unresponsive keys, sticky switches, and test simultaneous key press rollover. Works with mechanical keyboards, laptop chiclet keyboards, and external USB/Bluetooth keyboards.
Start Fullscreen Keyboard Test
To safely test Function keys (F1โF12), Tab, Escape, Space, and multi-key NKRO combos without triggering browser shortcuts, this test runs in dedicated Fullscreen mode.
Keyboard, NKRO & Switch Latency
Test switch actuation, mechanical switch chatter, keypress latency, and simultaneous N-Key Rollover (NKRO).
โจ๏ธ What is Keyboard Ghosting & NKRO?
Ghosting occurs when cheap membrane keyboards fail to register certain keys when three or more keys are pressed simultaneously, or register an unpressed "ghost" key.
N-Key Rollover (NKRO) allows you to press any number of keys simultaneously and every single key will register independently without blocking.
๐ก Keyboard Cleaning & Maintenance Tips
- Chattering Switches: If a key registers twice on a single press, clean the switch contact with a blast of compressed air or 99% isopropyl alcohol.
- Spill Recovery: Immediately unplug USB, turn the keyboard upside down on a dry towel, and do not power it on until thoroughly dry.