It's just a clock, but BIG. The current time, in your current time zone, in ISO 8601. There's also a UTC Clock, a Stopwatch, and a Timer.


Big Clock is free to use, and contains no advertising. If you would like to help support Big Clock, please —

☕️buy me a coffee !


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The clocks are big, but the pages are ultra-minimal: one request and less than 16 kB each. They are coded in plain vanilla JS (ES 5) and CSS (2.1), and designed specifically to work on older devices.

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