How to use it
Follow the on-screen instructions several times and compare repeated attempts rather than one score.
⌨️
Monitor & device
Keyboard N-Key Test
Check every key, maximum simultaneous input and keyboard ghosting.
EscapeF1F2F3F4F5F6F7F8F9F10F11F12
Backquote1234567890MinusEqualBackspace
TabQWERTYUIOPBracket LBracket RBackslash
CapsLockASDFGHJKLSemicolonQuoteEnter
Shift LZXCVBNMCommaPeriodSlashShift R
Control LMeta LAlt LSpaceAlt RMeta RControl R LUpDown R
Pressed now
0
Keys detected
0
Maximum simultaneous
0
Hold multiple keys to check ghosting and N-key rollover.
TOOL GUIDE
When to use it
Content reviewed · 2026-07-23
Check every key, maximum simultaneous input and keyboard ghosting.
Before you rely on the result
Results can vary with the browser, operating system, display, and input device.
Data handling
Values are used only on the current screen and are not sent or stored separately.
Related tools
A few tools that fit naturally with this task.