Unix timestamp converter
Seconds or milliseconds since 1970, and back.
Convert a Unix timestamp in seconds or milliseconds to UTC, and a date back to a timestamp. The conversion stays in this browser.
This stays in your browser. Nothing you type or drop here is sent to a server.
How to use this calculator
- Enter a number and choose seconds or milliseconds.
- Or pick a local date and time to get both units.
- The UTC line uses the ISO calendar.
Questions
Unix timestamp converter: is the input uploaded?
No. The page reads and writes only in this browser. There is no account and no server round trip.
What should I check before trusting the result?
Convert a Unix timestamp in seconds or milliseconds to UTC, and a date back to a timestamp. The conversion stays in this browser.