Ghosting & N-Key Rollover Test
Press multiple keys simultaneously to discover your keyboard’s rollover limit and spot ghosting issues.
- Press several keys at once to test rollover.
- Use Test Common Combos to check for ghosting (watch the warning area).
- Ghosted (missing) keys show in red; your maximum simultaneous keys is your NKRO.
- Click Export Results to save a CSV.
Note: Browsers may block some OS shortcuts; for best results, use a regular page (not a browser UI/URL bar) and avoid system-reserved combos.
Test Common Combos
Key Combination History
- No combinations recorded yet.
What Do These Results Mean?
N-Key Rollover (NKRO) is how many keys your keyboard can register at once. Higher is better for gaming and chord-heavy workflows.
Ghosting is when a valid key press doesn’t register because the keyboard’s matrix can’t resolve that combination. The red banner lists any missing keys during a combo test.
Tip: If your board supports firmware layers, try a different profile; some combos are blocked in certain layers to reserve shortcuts.
Recommended Keyboards
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Logitech MX Keys (Quiet Office, Full-size)
- Low noise for shared spaces
- Comfortable low-profile keys
- Wireless with long battery life
Razer Ornata V3 X (Low-profile)
- Slim low-profile gaming
- Silent membrane switches
- Ergonomic wrist rest
Keychron K8 Pro (Hot-swappable TKL)
- Swap bad switches in seconds
- Compact Tenkeyless layout
- Includes quiet linear option
Tip: If you hear pinging or feel key wobble, try quiet linear switches or add O-rings — cheap fix for many boards.
Want repeat-rate, chatter checks, and chord success tracking? Open Advanced Diagnostics