Convert tools

Time Zone Converter

Convert an ISO instant with an explicit offset into an IANA time zone.

Convert in your browser · No sign-up

Uses the browser’s time-zone database, including historical daylight saving. Ambiguous local times must be entered with an explicit offset.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

How to use

  1. Convert an ISO instant with an explicit offset into an IANA time zone.
  2. Choose the mode or options, then run the tool.
  3. Review the result, then copy or download the TXT file.

Example

2026-01-01T00:00:00Z → 2026-01-01 09:00:00 Asia/Tokyo

Details and limitations

Uses the browser’s time-zone database, including historical daylight saving. Ambiguous local times must be entered with an explicit offset.

Text stays in your browser; it is not sent to a conversion server.

FAQ

Time Zone Converter — What are the supported inputs and limits?

Uses the browser’s time-zone database, including historical daylight saving. Ambiguous local times must be entered with an explicit offset.

Format references

Tool page updated: