Timestamp (Unix) Converter

About this calculator

This converter moves between a Unix timestamp — the number of seconds elapsed since midnight UTC on January 1, 1970, the "epoch" — and a human-readable date, in both directions, showing the result in both UTC and ISO 8601 format. Computers store and compare dates internally as this single incrementing number precisely because it avoids time zone and calendar ambiguity; the readable date you see is just a display conversion applied to it.

Developers use it constantly when debugging APIs, log files or database records that store dates as raw timestamps, since a value like 1755561600 is meaningless to read at a glance but instantly clear once converted. It's also used to construct a specific timestamp for testing, to check when a token or session expires, or to translate a timestamp from one system's log into the local date and time it actually corresponds to.