Big Clock
Keep a readable local clock on screen with seconds, date, themes, colors, and fullscreen mode.
00:00:00
A QUICK WALKTHROUGH
How to use this tool
- Choose a size preset or set a custom size from 40 to 300px.
- Toggle the date, day, AM/PM, and 12-hour display options.
- Choose colors or a theme, then enter fullscreen when you need a dedicated clock.
Local device time
The display uses the browser device clock and updates once per second. It does not contact a time server or schedule alarms.
Saved preferences
Size, colors, theme, and display toggles are saved in this browser using localStorage.
GOOD TO KNOW
Common questions
Does this show my time zone?
It uses the device time and locale supplied by your browser.
Can I use it as an alarm?
No. It is a visual clock and does not provide alarms or precision timing.