Keyboard & Mouse Tester
All combined — keyboard visualizer, N-key rollover, ghosting, mouse tracker, polling rate, logs & settings
Waiting for input…
Device Summary
0
Active Input
—
Keyboard stats
Pressed:
0
Ghosting:
No
Mouse stats
Buttons:
0
Poll Hz:
0
Quick actions
Notes
Keyboard events are captured from the browser (focus required). Mouse sampling estimates polling rate based on pointermove intervals.
Keyboard Visualizer
N-key rollover
Simultaneous: 0
Ghosting detection
No ghosting detected
Tip: Click inside the page to ensure keyboard focus. For WebHID / raw device access use browser-specific APIs elsewhere.