TimeWindow - free, no upload, runs in your browser
TimeWindow shows one proposed meeting time side by side across every time zone your team spans, flags whether it falls inside normal business hours in each place, and exports a calendar file attendees can open directly. No accounts, no shared calendars, no server.
The usual ritual: someone proposes 15:00, three people open a converter, and each computes a different answer because of daylight saving or a typo. TimeWindow removes the ritual - type the time once, and every zone shows its local equivalent, with an in-hours or out-of-hours flag.
It covers the standard remote-team spread: US coasts, Latin America, Europe, the Gulf, India-adjacent offsets, and East Asia, plus any custom zone you add.
A time can be technically possible and still be terrible. TimeWindow marks each zone with whether the meeting lands inside a normal 9-to-5 window, so a slot that quietly dumps Sydney at 22:00 gets flagged before the invite goes out.
Set a duration too - a 30-minute catch-up has more viable slots than a 2-hour workshop.
When the slot works, export it as an ICS file. Attendees open it in Google Calendar, Outlook, or Apple Calendar and the event lands in their own time zone automatically - no manual conversion on their side.
Up to 30 per meeting. Add zones from the preset list or type any IANA zone name, like Asia/Shanghai or America/Chicago.
Yes. Calculations use the IANA time zone database, so a meeting scheduled across a DST transition date shows the correct local times.
A standard calendar file containing the meeting with its duration. Opening it in Google Calendar, Outlook, or Apple Calendar creates the event in each attendee's local time.
Yes - that is the point of the ICS export. Calendar apps render the event in whatever zone the viewer is in.
Yes, and it runs entirely in your browser. Your meeting plans are never uploaded.