Unix Timestamp Converter
Turn a Unix timestamp into a readable date in UTC and your local time, or pick a date and get the timestamp back. Seconds or milliseconds, both ways.
🔒 Runs entirely in your browser. Nothing you type is sent anywhere.
How to use it
- Paste a Unix timestamp to see it as a date. Numbers with 12 or more digits are read as milliseconds, shorter ones as seconds.
- Or pick a date and time to get the Unix timestamp in both seconds and milliseconds.
- The current Unix time ticks at the top; Use now drops it into the box.
What is a Unix timestamp
It is the number of seconds since 1 January 1970 UTC, the “Unix epoch”. Logs, APIs, databases and JWTs all use it because it is a single number with no time zone to argue about. JavaScript and many APIs use milliseconds instead, which is the same idea times a thousand.
FAQ
Seconds or milliseconds? A seconds timestamp for a recent date is 10 digits; the millisecond version is 13. This tool guesses from the length, so paste either.
Is anything sent to a server? No. The conversion runs in your browser, using its clock and time zone.