Timestamp Converter

Unix time (also called Epoch time or POSIX time) counts the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC — known as the Unix Epoch. Right now, Unix time is a 10-digit number in the billions. Most programming languages, databases, and APIs use Unix timestamps internally.

The format is popular because it's timezone-agnostic — a single integer that means the same thing everywhere in the world. Converting to human-readable dates requires knowing the target timezone. JavaScript timestamps are in milliseconds (13 digits), while most backend systems use seconds (10 digits).

This tool converts in both directions: paste a Unix timestamp to see the human-readable date, or pick a date to get the timestamp. It handles both seconds and milliseconds automatically, and shows the equivalent time in UTC and your local timezone.