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Gaming Keyboard Test - Check Ghosting & Key Rollover
Hold several keys at the same time and watch which ones stay lit. This shows whether your keyboard drops presses in games. This guide uses our free keyboard test.
Press keys on your keyboard. Each key turns green once it registers.
Mac users: hold Fn while pressing F1–F12, or turn on “Use F1, F2, etc. keys as standard function keys” in System Settings → Keyboard. Brightness, volume and other special keys are handled by the operating system, so no website can detect them and they will stay dark.
Keys pressed: 0 · Last key: -
How to test ghosting and rollover
- Hold W + A + Space + Shift together, then add E and R. All should stay highlighted.
- Try your own combo: the keys you hold in your favourite game, such as movement plus jump plus a skill key.
- If a key stops lighting up when another is added, your keyboard has a rollover limit.
What the results mean
- Ghosting: a key shows as pressed when it is not. Common on cheap membrane keyboards.
- Blocking: a key press is ignored when certain other keys are held.
- N-key rollover (NKRO): every key registers at once. Mechanical gaming keyboards usually advertise this, often over USB only.
- 6-key rollover (6KRO): up to six keys plus modifiers register. Fine for almost all games.
Some keyboards only offer full rollover on a USB connection and drop to 6KRO over Bluetooth or through a PS/2 adapter. Check your keyboard's software for an NKRO toggle. Browsers can only report what the operating system passes along, so a very fast tap may still be missed on a busy PC.
Last updated: 2026-10-04
Frequently asked questions
How many keys should a gaming keyboard register at once?
Six keys plus modifiers is enough for nearly all games. Full N-key rollover is a nice extra but rarely required.
Why do some of my keys not light up?
Dead or dirty switches, a Fn-lock state, or special keys the browser cannot see, such as media keys.