Unix Timestamp Converter
Convert a Unix epoch timestamp to a readable date (UTC and your local time), or pick a date and get its timestamp in seconds and milliseconds. Second and millisecond inputs are detected automatically.
Timestamp → date
Date → timestamp
Frequently asked questions
What is a Unix timestamp?
The number of seconds elapsed since 00:00:00 UTC on 1 January 1970 (the Unix epoch), ignoring leap seconds. It is the standard machine representation of a point in time.
Seconds or milliseconds — which do I have?
A 10-digit number is seconds and a 13-digit number is milliseconds for any modern date. JavaScript's Date.now() returns milliseconds; most Unix tools and APIs use seconds. This tool detects the unit automatically.
What happens in 2038?
Systems storing timestamps as signed 32-bit integers overflow on 19 January 2038. Modern 64-bit systems and JavaScript numbers are unaffected.