Developer tool
Convert Unix Timestamps and Dates
Convert Unix seconds or milliseconds to a UTC date, or convert an ISO date to a Unix timestamp.
Runs locally in your browser
Your text is not uploaded.
Simple steps
How it works
- 01
Enter a Unix timestamp or ISO date.
- 02
Choose conversion direction and seconds or milliseconds.
- 03
Copy the converted value.
Good to know
Frequently asked questions
What is a Unix timestamp?
It counts elapsed time from 1970-01-01T00:00:00Z.
How do I choose seconds or milliseconds?
Use seconds for typical ten-digit values and milliseconds for typical thirteen-digit values.
Are dates displayed in local time?
The converter reports ISO UTC output to avoid timezone ambiguity.
Can I convert a date to a timestamp?
Yes. Choose Date to timestamp and provide an ISO-8601 date string.
Is the input sent to a server?
No. Conversion happens locally in your browser.