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Unix Timestamp Converter

Available

Turn a Unix timestamp into a readable date, or a date into a timestamp, in seconds and milliseconds.

Use the tool

Everything runs in your browser. Your text is not uploaded or stored.

About this tool

Convert a Unix timestamp to a readable date, or a date to a timestamp. It shows the moment in UTC (ISO 8601), as Unix seconds and milliseconds, and in your own time zone.

How it works

  • A Unix timestamp counts the seconds since 1 January 1970 at 00:00 UTC.
  • With automatic detection, numbers with 12 digits or more are read as milliseconds and shorter ones as seconds. You can force either.
  • Text such as 2026-11-04T10:30:00Z is read as a date. A date without a time zone is read in your browser's time zone.

Common questions

Seconds or milliseconds?

JavaScript and many APIs use milliseconds (13 digits today). Unix systems and many databases use seconds (10 digits today).

Why does the local time differ from UTC?

UTC is the same everywhere. Local time adds your time zone offset, including daylight saving time where it applies.

Your text is processed in your browser and is never uploaded.

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