What is this world timezone converter?
A free, browser-based tool that converts one source time into the local time of many cities at once. Pick a date, time, and the city the time belongs to, then add the cities you care about — Tokyo, New York, London, and more. It's built for scheduling global webinars, customer calls, and distributed-team meetings without doing the math by hand. Conversions are daylight-saving (DST) aware because they use the browser's Intl APIs, and everything runs locally, so your data is never uploaded.
How to use it
- Enter the source date and time on the left.
- Choose the source city — the timezone that time belongs to.
- Add the target cities you want to compare.
- Read each city's local time on the right, then copy all to paste into an invite.
Common use cases
- Scheduling a global webinar and announcing the start time in every region.
- Finding a sane meeting slot for a distributed team across continents.
- Confirming a customer call time without confusing DST offsets.