How to use this test
- Press any key on your physical keyboard.
- Confirm that the corresponding key lights up green on the virtual layout.
- Test modifier keys (Shift, Ctrl, Alt) and Function keys (F1-F12).
- Review the detected key code and event history table.
How to understand your result
Looks good: All pressed keys registered distinct event codes.
Issue observed: A physical key press produced no event or repeated erratically.
Troubleshooting: what to try next
- Clean beneath keycaps with compressed air to remove debris.
- Ensure external keyboard USB cable is firmly connected.
What this test cannot tell you
Operating system secure keys (e.g. Ctrl+Alt+Del) cannot be intercepted by web pages.
Frequently Asked Questions
Certain function keys have OS-level shortcuts; the tester intercepts standard events where allowed.
EP
Tested & Reviewed by [REAL AUTHOR NAME - OWNER TO COMPLETE]
Last Reviewed: 2026-10-17 • Test Method: keydown and keyup event listener mapping to SVG/DOM key matrix • How We Test