Unix Timestamp Converter

What a Unix timestamp is

A Unix timestamp, or epoch time, is the number of seconds since 00:00:00 UTC on 1 January 1970, not counting leap seconds. It is how most databases, logs, APIs and JWT claims store a moment in time, because a single integer is compact, unambiguous and independent of time zones.

Paste a timestamp to see it as an ISO 8601 date and a readable UTC date, or paste a date to get its timestamp back in both seconds and milliseconds.

Seconds or milliseconds?

Unix tools, most server languages and JWTs count in seconds. JavaScript's Date.now() and Java's System.currentTimeMillis() count in milliseconds. Present-day timestamps have 10 digits in seconds and 13 in milliseconds, so the converter treats any number longer than 10 digits as milliseconds and anything shorter as seconds. 1700000000 and 1700000000000 are therefore the same moment.

If a converted date lands in 1970 or tens of thousands of years in the future, the value was almost certainly read in the wrong unit.

Dates and time zones

Timestamps are always UTC. When you enter a date, include an offset or a trailing Z (for example 2024-02-29T12:00:00Z) to be unambiguous. A full date and time without an offset is read in your browser's local time zone. A date-only value such as 2024-02-29 is treated as midnight UTC. To see one moment across several cities, use the time zone converter.