What the result actually measures
The page reports keyboard events delivered to the focused browser tab. It shows physical `code`, interpreted `key`, repeat state and the largest simultaneous group observed in the current session.
Measurement boundary: Operating systems and browsers intercept some shortcuts before a webpage can read them. The tool cannot certify every possible matrix combination or distinguish a keyboard switch problem from a driver/layout issue on one test alone.
How to interpret the output
Physical code
The code represents the physical key position and is usually more useful for gaming layouts than the character produced by the active language layout.
Repeat event
Holding a key normally generates repeated keydown events. A repeated event after release is not normal and should be retested.
Simultaneous maximum
This is only the largest group observed in your chosen combinations, not a laboratory NKRO certification.
Troubleshooting unexpected results
A shortcut never appears
Try the keys separately. The browser or operating system may reserve the full combination.
Wrong character appears
Compare the physical code and the current OS keyboard layout. The key may be functioning while the layout maps it differently.
Frequently asked questions
Can the site record what I type elsewhere?
No. The tester listens only while this page is open and testing is active; key sequences are not uploaded.
Why does the browser react to F5 or Ctrl+L?
Those are browser-reserved actions and may occur before the page can prevent or observe them.
Does a missed combination prove ghosting?
It is an observation worth repeating. Confirm with the guided ghosting test and another connection or device.
