Press multiple keys together to inspect rollover behavior in your browser.
Hold the combinations you actually use and see which key events reach this browser at the same time.
Select a chord, start a trial, hold every expected key together, then release all keys. Each trial saves the best simultaneous snapshot, so separate taps cannot count as a successful chord. Repeat each combination three times.
Choose a combination to begin. Results stay in this tab only.
| Expected | Best simultaneous snapshot | Result |
|---|---|---|
| No combination trials yet. | ||
If a combination fails repeatedly, test each key alone, then add keys one at a time. A browser shortcut or incomplete overlap can also hide a key. A successful chord demonstrates that combination on this setup; it does not certify N-key rollover. These are diagnostic combinations, not required Geometry Dash bindings.
Result guide
This page focuses on how many simultaneous key presses remain visible to the browser and which keys are present at the same time. It complements the combination-focused ghosting visualizer.
For Geometry Dash, rollover is usually less important than repeatable timing, but it can matter on unusual multi-key control setups. Test the exact keys you use rather than assuming a keyboard-wide NKRO claim applies to every browser condition.
The page cannot certify the keyboard's advertised hardware rollover specification. It only reports events that survive the keyboard, operating system and browser input path.
