Days, weeks and months between two dates, plus adding or subtracting days from a date
Unix Timestamp Converter
Runs locally
Use Unix Timestamp Converter
What it does
Convert a Unix timestamp in seconds or milliseconds to a UTC and a local date, or a date back to a timestamp. Unix times turn up in DKIM-Signature t= and x= tags, JWT iat and exp claims and many API logs.
It runs entirely in your browser: nothing you enter is uploaded.
Example
Timestamp in seconds
17000000002023-11-14 22:13:20.000 UTC
Tue Nov 14 2023 22:13:20 GMT+0000 (Coordinated Universal Time)Shows 2023-11-14 22:13:20.000 UTC and, on the second line, the same moment in your browser's time zone.
FAQ
What can it convert?
A timestamp in seconds or milliseconds (you choose the unit) into an ISO-style UTC date plus your local time, and a date and time picked in your local time zone back into seconds and milliseconds. The fields at the top show the current timestamp.
Why do I get a date far in the future, or 1970?
The unit is not detected: a 13-digit millisecond value read as seconds lands tens of thousands of years ahead, and an empty field converts as 0, which is 1970-01-01 UTC. As in all Unix time, leap seconds are not counted.
Is anything sent to a server?
No. All conversions use your browser's clock and date functions; nothing is uploaded.