Keyboard ghosting & rollover test

Hold combinations of keys at the same time. If a physical key is down but does not appear below, that combination is not being reported to the browser.

● Runs locally in this browser.

What this means

Run the test to interpret your result

Your result will be explained here, including what is normal, what may indicate a problem, and the most useful next step.

Contextual replacement recommendation

Reserved for a relevant product recommendation when a result suggests a hardware issue.

View options →

No keys held

Click this page, then hold key combinations.

Held now0

Peak rollover0

Unique keys seen0

Listening for keys.

Ghosting vs rollover

Rollover is how many simultaneous keys a keyboard can report. “Ghosting” is often used more broadly for missing or unintended keys in multi-key combinations. Test the combinations you actually use in games or shortcuts, not just a random maximum.