Clocks / Full screen
Large Digital Clock: Full-Screen Clock with Seconds
Show the time in huge digits that fill the screen, with seconds and the date if you like, in 12- or 24-hour format and white, black, or green, for a spare tablet, a classroom projector, or a desk monitor.
Large Digital Clock: Full-Screen Clock with Seconds: The page reads your device's clock four times a second and draws the time in digits sized to the screen width. While it is open it asks the browser to keep the screen awake, and your choices are remembered in this browser. Runs 100% locally in your browser with zero server file uploads.
- Category
- Time & calendar tools
- Runs
- In your browser
- Cost
- Free · no sign-up
- Availability
- Ready to use
Runs entirely in your browser
The clock shows your device's time and keeps the screen awake while the page is open, where the browser allows it. Use full screen on a spare tablet or a projector; press Escape to leave full screen.
Uses
A spare tablet on a stand makes a bedside or kitchen clock; on a projector it keeps a classroom, a stage, or a live stream on time.
Counting down instead
For a countdown in the same big digits, use the online timer.
How to use it
- Choose 12- or 24-hour time, seconds, the date, and the colours.
- Press full screen.
- Leave it running; the screen stays awake where the browser allows.
Privacy & limitations
The time comes from your device; nothing is sent anywhere.
Related tools
Frequently asked questions
Is the time accurate?
It is your device's own time, which phones and computers set automatically from the internet; if it is wrong, check your date and time settings.
Why does the screen still turn off?
Keeping the screen awake needs the Screen Wake Lock feature, which most current browsers support; on others, change the device's sleep setting while the clock is showing.
Can I show another time zone?
This clock follows your device. To see the time elsewhere, use the time zone converter.
Free tool · runs in your browser · no account required