HeroTools / Productivity
Local · Private · Free

World Clock

Watch the current time tick live in every city you care about — with the date, the day offset from yours and a day/night marker, right on your device.

Calculated locally with your browser's own time-zone database (daylight-saving handled automatically) — nothing is sent anywhere.

No cities yet — add one above to start the clock.

Always know what time it is, anywhere

Every clock here updates each second using your browser's built-in time-zone data, so daylight-saving shifts are handled for you and a city's "+1 day" is computed from the real calendar — not a guess. Your chosen cities are saved on this device only, and the whole thing runs offline. Free forever.

About World Clock

World Clock is a free, private productivity tool that runs entirely in your web browser. Track the current time across multiple cities and time zones at a glance. Because everything happens locally on your device, your files and data are never uploaded to a server, there is no sign-up or installation required, and it keeps working offline. It is handy for world clock, time zone, cities, utc. Like every HeroTool by Digital Heroes, World Clock is 100% free with no limits.

How to use World Clock

  1. Open World Clock — it runs entirely in your browser, with no signup.
  2. Fill in the fields or choose the options you want.
  3. Adjust the options to match exactly what you need.
  4. Copy or download your result — it is free, and your data stays on your device.

Frequently asked questions

Is World Clock free?

Yes — World Clock is completely free for everyone. No sign-up, no account and no usage limits.

Is it private? Are my files uploaded anywhere?

No. World Clock runs entirely in your browser on your own device, so your data never leaves your computer and nothing is uploaded to a server.

Does it work offline?

Yes. HeroTools is a Progressive Web App — once the page has loaded it keeps working offline, and you can install it as an app from your browser.

Do I need to install anything or create an account?

No. Just open the page and start using it. Installing it as an app is optional and only adds offline convenience.

What does World Clock do?

Track the current time across multiple cities and time zones at a glance.

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