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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.

Result

Add your input or load an example, then run the tool. Your result will appear here.

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

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

Format references

Tool page updated: