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.
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How to use
- Select the 12-hour or 24-hour format.
- Turn seconds, date and blinking colon on or off.
- 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.
Frequently Asked Questions (FAQ)
Can I make the clock fullscreen?
Yes. Press Fullscreen and the clock fills the whole screen with huge digits; press Esc to exit.
Does it show 12 or 24 hour time?
Both formats are available, with optional seconds, the date and a blinking colon.
Where does the clock get the time from?
From your device clock. Keep your device time and time zone correct for accurate time.
What is the big clock good for?
Presentations, classrooms, exams and shop counters - anywhere the time needs to be read from across the room.