Help — Keyboard Test

Click the page to give it focus, then press keys. The key color shows how many times it has been pressed. Colors do not fade — they stay until you press RESET.

Modes:

• Keyboard — visual press heatmap.
• Rollover — N-key rollover / anti-ghosting test (hold several keys at once).

Form factor (toolbar dropdown): switch between Full 104, TKL 87, 75%, 65%, 60% and JIS 109. The ⌨ icon button toggles ANSI ↔ ISO Enter shape.

Lock indicators (Caps Lock, Num Lock, Scroll Lock) — in the toolbar next to Reset/Export. They turn amber while the lock is active.

Privacy: All data stays exclusively in your browser. The page makes no network calls (CSP connect-src 'none'). Export creates a local JSON file. Settings (scale, theme, sound, form factor) are stored in localStorage under the kbtest: prefix.

Keys with ⚠ (Power, Sleep, Wake) — the operating system captures them before the browser; they cannot be tested from a web application.

Shortcuts blocked while the Keyboard mode is active: F1–F12, Tab, Backspace, arrow keys, Page Up/Down, Home, End, Ctrl/Alt/Meta combinations. Switch to Rollover mode if you need them.