Time Zone Converter & World Clock
Convert times across zones, see a live world clock, and plan meetings.
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Use on any page (bookmarklet)
Want Time Zone Converter & World Clock without leaving the page you're on? Drag the button below to your bookmarks bar, then click it on any website to open Time Zone Converter & World Clock right there — it runs entirely in your browser.
Use responsibly: a bookmarklet runs on whatever page you click it on. Avoid sensitive sites such as online banking, payment, or healthcare pages — you run it at your own risk. Everything is processed locally and no data is sent anywhere. See our Terms.
- Show your bookmarks bar if it's hidden — Ctrl+Shift+B (⌘+Shift+B on Mac).
- Drag the button above onto the bookmarks bar.
- Open any website and click the bookmark — the Time Zone Converter & World Clock panel appears in the top-right corner. Use ✛ to move it between corners, or ›/‹ to tuck it against the edge and pull it back out.
- Click the bookmark again (or the ✕) to close it.
Note: a few sites with strict security policies may block bookmarklets.
Examples
Convert a time
Input
3:00 PM in New York
Output
8:00 PM London · 5:00 AM (next day) Tokyo
World clock
Input
Add Tokyo, London, New York
Output
Live local time for each, with GMT offset
About this tool
This free online time zone tool combines a world clock, a time zone converter, and a meeting planner. Build a list of the cities you care about once, then switch between live clocks, convert a specific time across all of them, or scan a planner grid to find a meeting time that works for everyone. It uses your browser's built-in time-zone data, so daylight saving is handled automatically and nothing is uploaded.
How to use
- Add the time zones you work with (type a city name).
- World Clock: see the live local time everywhere at once.
- Converter: pick a source zone, date, and time to translate it.
- Meeting Planner: find the hours that suit every zone.
Who it's for
Remote teams scheduling across continents, travelers tracking home and destination time, and anyone coordinating calls, launches, or deadlines with people in other time zones.
Frequently asked questions
What does this time zone tool do?
Three things in one: a live World Clock for the cities you choose, a Converter that translates a specific date and time from one zone into all the others, and a Meeting Planner grid that highlights hours that fall in everyone's working day.
Is it free?
Yes — completely free with no sign-up. It runs entirely in your browser using the built-in time-zone database, so nothing is uploaded.
Are daylight saving time changes handled?
Yes. It uses the browser's IANA time-zone data, so DST transitions and historical offset changes are applied automatically for each date.
Are my chosen cities saved?
Yes. Your list of time zones is saved in your browser's local storage, so it's still there next time you open the tool.
How does the meeting planner work?
Pick a reference zone and date. The grid shows each zone's local hour for every hour of that day; working hours (9:00–18:00) are shaded, and any column where every city is within working hours is marked as a good slot for everyone.
Which time zones are supported?
All IANA zones your browser knows — typically 400+ cities worldwide. Start typing a city name to find its zone.
Can I convert a time from a specific city, not just my own?
Yes. In the Converter tab choose any of your zones as the source, enter the date and time, and every other zone updates to the matching local time.
Learn more
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