About Timestamp Converter

Timestamp Converter reads a Unix timestamp or a date string and shows it as every common form: Unix seconds, milliseconds and microseconds, ISO 8601, the RFC UTC string, a local string in a time zone you pick, date-only and time-only, the weekday, the ISO week number, and a relative phrase.

Everything runs in the page. Nothing is uploaded.

How to use it

  1. Type an epoch number, an ISO date, or the word now. The Now button fills in the current epoch.
  2. The unit of a plain number is guessed by length: up to 11 digits is seconds, 12 to 14 milliseconds, 15 or more microseconds.
  3. Pick a time zone for the Local row.
  4. Click any value to copy it.

Common questions

How does it know if my number is seconds or milliseconds?

By digit count: up to 11 digits is treated as seconds, 12 to 14 as milliseconds, 15 or more as microseconds.

Which time zones are available?

A short list of common IANA zones; the Local row uses whichever you select, everything else is UTC or absolute.

What is the relative time measured against?

Your device clock at the moment you view the page.

Is the timestamp uploaded?

No. Parsing and formatting run in your browser.