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N-Key Rollover Test

Measure how many keys can remain registered at the same time.

🔒 Local-first◉ Modern browser recommended.
⌨
N-Key Rollover TestKeyboard
Local-first
Keyboard layout
EscF1F2F3F4F5F6F7F8F9F10F11F12PrtScScrLkPause`1234567890-=⌫Tabqwertyuiop[]\Capsasdfghjkl;'↵Shiftzxcvbnm,./ShiftCtrlMetaAltSpaceAltMetaMenuCtrlInsHomePgUpDelEndPgDn↑←↓→Num/*-789+456123↵0.
○Untested●Pressed✓Observed−Absent on my keyboard⊘Browser unavailable!Release and recheck≈Possible chatter
Keyboard details

US QWERTY

Legends only: change your input language in your operating system.

IME / composition input

Ready

Hold Esc for 2 seconds to release the keyboard.
Last key—
Active keys0
Max simultaneous0
Key presses0
Progress
Expected combination
Detected
Missing

Combination history

    This confirms browser-observed inputs, not complete hardware health.

    Keyboard details

    Ready

    Some displayed keys may be reserved by the browser or operating system. Unobserved keys are not evidence of a fault.

    Hold Esc for 2 seconds to release the keyboard.

    How it works

    How it works

    Use the interactive panel above and watch the live measurements. Results depend on events and capabilities exposed by your browser.

    Runs in your browser

    Core tests are processed locally in your browser. Camera and microphone streams are not intentionally uploaded by Testvexa.

    FAQ

    Does this test upload my input?

    Core interaction is processed in your browser. Testvexa does not intentionally upload camera or microphone streams.

    Can browser limitations affect the result?

    Yes. Browsers expose different hardware APIs, so unsupported access is not the same as faulty hardware.