Epoch & Unix Timestamp Converter
Convert a Unix timestamp to a readable date and back — in seconds or milliseconds, UTC and your local time. Everything runs in your browser; nothing is sent anywhere or stored.
Timestamp → Date
Date → Timestamp
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Frequently asked questions
What is a Unix timestamp?
A Unix timestamp (also called epoch time) is the number of seconds that have elapsed since 00:00:00 UTC on 1 January 1970, not counting leap seconds. It is a simple, time-zone-independent way to store a moment in time.
Seconds or milliseconds?
Unix time is classically in seconds (10 digits until the year 2286). JavaScript, Java and many APIs use milliseconds (13 digits). This converter auto-detects which you pasted and shows both.
Is my data sent anywhere?
No. Every conversion runs in your browser — nothing is uploaded to a server and nothing is stored.
What is the year 2038 problem?
Systems that store Unix time in a signed 32-bit integer overflow on 19 January 2038, after which the value wraps to a negative number. Modern 64-bit time types avoid this.
Which time zones are shown?
A timestamp is converted to both UTC and your local time zone, plus ISO 8601 and a relative "time ago". A date you enter is read in your local time zone and converted to the timestamp.