Unix Timestamp Converter
Convert Unix timestamps to readable dates and convert dates back to epoch seconds or milliseconds.
Convert a timestamp
Unix time and timezones
Unix time identifies one instant independently of timezone. Seconds are the traditional unit; JavaScript and many telemetry systems use milliseconds. Formatting applies UTC or the browser's configured timezone without changing the instant.
Seconds versus milliseconds
A present-day timestamp near ten digits is normally seconds, while thirteen digits normally means milliseconds. Explicit unit selection is safer for historical or unusually large values.
Frequently asked questions
What is a Unix timestamp?
It is the number of elapsed seconds since 1970-01-01 00:00:00 UTC, excluding leap seconds.
How can I identify milliseconds?
Current millisecond timestamps normally contain 13 digits, while second timestamps contain 10. This tool also lets you choose the unit explicitly.
Does a Unix timestamp include a timezone?
No. It represents one instant; a timezone is applied only when that instant is displayed as a date and time.