Keyboard Ghosting Test
Hold down as many keys as you can. Every key you hold should appear. A missing key is ghosting.
Best combo: —
Try a gaming combo
How to Use the Keyboard Ghosting Test
Cheap keyboards can only register a few keys at once, and some combinations drop keys (ghosting). In games, that means you can't run, strafe, jump and crouch at the same time. This test shows every key you are holding, the most you have held at once and an estimate of your rollover.
- Click on the page. So it receives your keys.
- Hold keys together. Start with W + A + Shift + Space.
- Add more keys. Watch the count rise.
- Try the combos. A missing key means ghosting.
What Is Ghosting and Rollover?
| Term | Meaning |
|---|---|
| Ghosting | A key you press doesn't register (or a phantom key appears) while others are held |
| 2KRO | Only 2 keys guaranteed at once |
| 6KRO | 6 keys plus modifiers, common over USB |
| NKRO | Every key at once, best for gaming |
Laptop Keyboards
Laptop keyboards usually manage only 2–4 keys in some combinations. That is a limit of the wiring, not a fault.
Can I Fix Ghosting?
- Turn on NKRO mode if your keyboard has it (often Fn + a key).
- Try a different USB port, because some modes only work over USB.
- Change game keybinds to combos that work.
- Upgrade to a keyboard with full NKRO.
Frequently Asked Questions
How many keys should I get?
At least 6 for gaming. NKRO keyboards show every key.
Why do only 3 keys show?
Your keyboard has limited rollover for that combo.
Does it detect phantom keys?
Yes, unexpected keys appear in the list.
Does the Windows key count?
Some keys are taken by the OS and may not show.
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