How to use
- Press F or use the fullscreen button.
- Toggle seconds, 12/24-hour, UTC/local, and theme from the toolbar.
- Use the settings panel for chime, wake lock, and a shareable settings URL.
Full Screen Clock
Shows analog and digital clocks at the same time.
FAQ
Will it drift in the background?
Browsers can throttle timers in background tabs. When the page becomes visible again, the clock re-syncs using the current time.
Does the share URL include “state”?
No. The URL contains settings only (format, timezone, theme, etc.).