Keyboard Ghosting Test
Try representative key chords and compare the exact keys you hold with what the browser receives together. There is no universal ghosting combination because keyboard matrix layouts differ by model.
Keyboard Ghosting Test controls
Choose a combination, then hold every highlighted key during the 3-second observation. Space and page-navigation keys are captured; press Esc to release normal page scrolling.
Scroll the keyboard horizontally for more keys.
The result assumes you physically held the instructed keys. Reserved operating-system or browser shortcuts may never reach this page.
Keyboard Ghosting Test is ready.
How to run the guided test
- Choose one of the representative, non-reserved key combinations.
- Select Start test and get ready during the short preparation period.
- Hold every highlighted key throughout the 3-second observation.
- Compare the best simultaneous browser-detected snapshot with the expected combination.
Why these combinations
Ghosting and key blocking depend on the keyboard's internal matrix, so the same problematic combination does not apply to every model. The presets include common gaming chords, smaller three-key chords, and a clearly labelled six-key stress chord. They are representative probes, not a canonical certification set.
What a missing key means
A missing code means that key was not part of the best simultaneous browser-observed snapshot for this guided combination. The page cannot prove why: keyboard matrix behavior, firmware, remapping, operating-system shortcuts, browser handling, or the user not fully holding the instructed set can all affect the result.
Why this is not an automatic ghosting verdict
A browser can only report key events that reach the page. This test knows the intended set because it gives you the exact combination to hold, but it still does not directly inspect keyboard hardware and therefore does not label the keyboard as failed or ghosting-confirmed.