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Free Timezone Converter Online

A free timezone converter lets you pick a source timezone, enter a date and time, and add one or more destination timezones to see the equivalent local time in each — with UTC offsets and a side-by-side timeline bar to spot overlap for meetings. Uses Luxon.js and Intl.DateTimeFormat in your browser — no signup needed.

Coordinate across countries without mental math. Select a source timezone (defaults to yours), enter a date and time, and add destination cities from a searchable list. See converted times, UTC offsets, and a 24-hour timeline bar for each zone — including typical 9–5 hours — so you can spot meeting overlap at a glance. Built with Luxon.js (CDN) and the browser Intl API. Free, no signup, nothing uploaded.

Source timezone

Destination timezones

New York — Eastern (EST/EDT)London — GMT / BSTTokyo — Japan (JST)

Select a source timezone, enter a date and time, and add destination timezones to see instant conversions and a visual timeline for scheduling across countries.

Runs 100% in your browser. Your data never leaves your device.

Luxon.js loads from a CDN for reliable IANA timezone parsing — datetime-local input is interpreted as wall time in the source zone. Conversions use Luxon plus Intl.DateTimeFormat for formatted output and short UTC offsets. The timeline maps each zone's local hour onto a 24-hour bar with a marker and a shaded 9 AM–5 PM band. No backend.

How to Use Timezone Converter

  1. Confirm or change the source timezone (Use current time sets now in your zone)
  2. Enter the date and time in the source timezone
  3. Add one or more destination timezones from the searchable list
  4. Review converted times, UTC offsets, and the timeline bars
  5. Use the timeline to find overlap for scheduling calls across countries

When Would You Use This?

Remote teams scheduling a standup add New York, London, and Bangalore, paste tomorrow's slot, and scan the timeline to see who would be outside working hours.

Freelancers on Upwork or Fiverr convert a client's "3 PM their time" into local time before accepting a deadline — searchable city names beat memorizing UTC offsets.

Developers debugging log timestamps paste an incident time in UTC and add staging vs production regions to compare without opening a terminal or installing a desktop world clock.

Frequently Asked Questions

Is this timezone converter free to use?
Yes, completely free. No signup, no login, no payment ever.
Do I need to create an account?
No account needed. Open the tool and convert times immediately.
Is my data safe?
Everything runs in your browser. Dates and times are never uploaded to our servers.
How many destination timezones can I add?
As many as you need. Each appears in the results and on the timeline bar so you can compare several cities at once.
Does this handle daylight saving time?
Yes. Luxon and the browser Intl API use IANA timezone data, so DST shifts are applied automatically for the date you enter.
What is the timeline bar for?
Each row is a 24-hour day in that timezone. The dot marks your selected time; the shaded band is typical 9 AM–5 PM. Compare rows to see overlap for meetings.
Why does this load Luxon from a CDN?
Luxon handles IANA timezone rules reliably, including DST. It loads once when you open the tool, then runs locally — no server calls for conversions.
Does this work offline?
After the page and Luxon have loaded once, conversions work offline. The first visit needs a network connection to fetch Luxon.

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