Time Zone Converter
Runs locally in your browser. Nothing leaves your device.Convert dates and times locally between IANA time zones such as UTC, Berlin, London, New York and Tokyo.
Input
Target Time Zones
4/12
UTC
UTC
01:30 PM
Thursday, Jul 23, 2026
UTC+00:00 · UTC · same day
London
Europe/London
02:30 PM
Thursday, Jul 23, 2026
UTC+01:00 · GMT+1 · same day
New York
America/New_York
09:30 AM
Thursday, Jul 23, 2026
UTC-04:00 · EDT · same day
Tokyo
Asia/Tokyo
10:30 PM
Thursday, Jul 23, 2026
UTC+09:00 · GMT+9 · same day
How it works
- 1
Choose the source time zone and time
Choose date, time, and source time zone, or use “Use now.”
- 2
Add time zones
Add up to 12 more time zones via search.
- 3
Compare and copy the results
Sort the list as needed and copy individual or all converted times.
Good to know
The time zone converter compares a time across up to 12 time zones at once directly in your browser, with search, multiple sort modes (alphabetical, local time, UTC offset, custom), and 12-/24-hour format. Ambiguous or nonexistent local times caused by daylight saving transitions are detected and can be snapped to the next valid time.
Calculation runs locally in the browser; date, time, and time zones are not uploaded. Time zone rules come from the browser; very short-notice legal changes may require a browser or app update, and time zone rules can change politically — verify critical appointments in a calendar as well.
Typical use cases
Plan meeting times across multiple time zones
Compare a proposed time simultaneously across up to 12 time zones to find a suitable slot for an international team.
Detect daylight saving edge cases
Check whether a planned time is ambiguous or doesn't exist at all due to daylight saving transitions, before confirming an appointment.
Tips for better results
Set your own time zone as reference
Use “My time zone” to keep your local time as a fixed reference while comparing other time zones.
Also verify critical appointments in a calendar
Time zone rules can change politically on short notice — for legally or business-critical appointments, an additional check is worthwhile.
Features
Up to 12 time zones at once
Compare a time across multiple time zones with search and flexible sorting.
Local and private
Date, time, and time zones stay on your device and are not uploaded.
Detection of daylight saving edge cases
Ambiguous or nonexistent local times are detected and can be corrected.
Frequently asked questions
What happens with a nonexistent time?
The tool detects local times that don't exist due to daylight saving transitions and offers to snap to the next valid time.
Are date and time uploaded?
No. Date, time, and time zones are not uploaded and stay on your device.
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