thaitools.techPractical tools for life in Thailand
English interface

Unix timestamp converter

Convert Unix seconds or milliseconds to UTC ISO 8601 and Bangkok time.

ReviewedCheck before reuse
Saves this tool's name on this device only (up to 20). No form values.
Only visible result text is included. Form fields are not read. Review sensitive values before sharing.

The main result is UTC ISO 8601; Bangkok time is shown separately.

Enter values, then process to see the result.

How to use it

  1. Enter a timestamp.
  2. Select seconds or milliseconds.
  3. Compare UTC and Asia/Bangkok output.

Important limitation

Uses ECMAScript time values and does not represent leap seconds.

The interactive form is fully localized in English.

Reviewed 2026-09-09; next review 2027-03-11.

Core calculations, cited sources and main examples have been reviewed within the stated scope.

Sources

ECMA-262 — Date Objects and Time ValuesEcma International / TC39 · opens in a new tabSupports the method and scope stated on the tool page; consult the source for case-specific rules.Source checked 2026-09-11
Recorded updates

Review history

Site changelog

Dates describe the review scope recorded below. A page update does not mean every source was checked again.

  1. Last recorded source/method review

    Core calculations, cited sources and main examples have been reviewed within the stated scope.

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