About TimezoneKit
TimezoneKit is a free, fast, and accurate set of timezone tools built for anyone who works, collaborates, or communicates across time zones. Whether you're scheduling a meeting between New York and Tokyo, checking what time it is in London right now, or converting a Unix timestamp — TimezoneKit gives you a clean, reliable answer instantly.
All calculations happen directly in your browser. There's no account required, no data sent to a server, and no cost. The tools work on any device, in any browser, anywhere in the world.
TimezoneKit uses the IANA Time Zone Database — the same authoritative source used by operating systems, programming languages, and standards bodies worldwide. Daylight Saving Time transitions are handled automatically for every region.
600+
Cities covered
100%
Free, always
DST
Automatically handled
Our tools
- Timezone Converter — Convert any time between two cities or time zones instantly, with DST awareness and a 24-hour reference table.
- Meeting Planner — Add multiple cities and find the best time to meet when business hours overlap across all locations.
- World Clock — See current local times in 60+ major cities across all regions, with live updates every second.
Contact us
We'd love to hear from you — whether it's a bug report, a feature request, a city that's missing, or general feedback. TimezoneKit is a small project and every message is read personally.
You can also reach us directly at hello@timezonekit.com