Keyboard & NKRO Tester
Press keys individually or simultaneously to verify N-Key Rollover, eliminate ghosting, and check every switch before queueing ranked.
Run an instant hardware check on 60%, TKL, or full-size keyboards right inside your browser with zero software installed. Active switches glow bright green while tested keys stay highlighted so you can audit every single switch across the board.
Why N-Key Rollover (NKRO) matters in tactical FPS
In Counter-Strike 2 and Valorant, clean movement depends on rapid counter-strafing while crouching, inspecting, or switching utility. If a keyboard shares scan matrix traces without diodes, holding three or four movement keys can block another key press โ a failure called keyboard ghosting or key jamming.
Hold down W, A, S, D, Left Shift, Control, and Space together on the matrix above. Any true gaming mechanical or Hall-Effect board will light up every key simultaneously and register Peak NKRO above 6.
How to spot switch chatter and Rapid Trigger issues
Key chatter happens when an oxidized leaf spring or miscalibrated Hall-Effect actuation point registers two inputs from one tap. Watch the Keys/Sec counter and Last Code readout while tapping a suspect switch slowly.
Pairing clean key switches with disciplined movement mechanics is covered in depth in our Snap Tap & Rapid Trigger guide and FPS Bind Generator.
Frequently Asked Questions
What is N-Key Rollover (NKRO)?
N-Key Rollover means every individual switch can register simultaneously regardless of how many other keys are held down. Most USB membrane boards max out at 2-key or 6-key rollover (6KRO), whereas gaming boards support full NKRO.
Does this keyboard tester work for 60% and Hall-Effect boards?
Yes. Toggle between Full 100% and Compact 60% layouts above. Hall-Effect keyboards like Wooting 60HE or Razer Huntsman V3 Pro send standard HID keycodes and work identically.
Can I save proof of my keyboard test?
Yes. Click Download Report after testing every key to export a timestamped plain-text verification certificate listing all tested keycodes and peak rollover.
