Keyboard tester

How to use it

1. 1.Click into the tester and press any key to confirm events are arriving.
2. 2.Press the key or combination that is misbehaving and watch key, code, modifiers, repeats, and release.
3. 3.Try another browser, layout, or keyboard to work out whether it is the hardware, the OS, or the app.

Options

• Key is the character your layout produced. Code is the physical position on the board.
• Modifier and repeat state show what a shortcut or a held key is actually doing.

Limitations

• The operating system and the browser keep some shortcuts for themselves, so the page never sees them.
• Browser events cannot diagnose firmware, ghosting, rollover limits, accessibility remapping, or a failing switch.

Common questions