Online Big Clock

Need the time big enough to read across the room? This giant on-screen clock is perfect for presentations, classrooms, exams and shop counters — with 12/24-hour formats, optional seconds and date, and a fullscreen mode that fills the whole display.

How to use

1. Select the 12-hour or 24-hour format.
2. Turn seconds, date and blinking colon on or off.
3. Press "Fullscreen" — the clock fills the whole screen. Press Esc to exit.

The time comes from your device clock — keep your device time zone correct for accurate time.

Tips

• Use the Fullscreen button for presentations, exams and shop displays.
• Toggle seconds, date and the blinking colon to suit the setting.
• 24-hour format avoids AM/PM confusion in shared spaces.
• Keep the device plugged in — a full-brightness screen drains the battery fast.