The seconds and milliseconds toggle keeps API debugging clear when services use different timestamp precision.
Unix timestamp converter
Convert Unix timestamps both ways.
Switch between seconds and milliseconds, convert date to timestamp, and parse timestamp back to a readable local date.
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Both conversion directions update on the page without a server call.
How to use the Unix Timestamp Converter
- 1
Choose seconds or milliseconds.
- 2
Enter a readable date or timestamp.
- 3
Read the converted timestamp or local date.
Frequently asked questions
What is a Unix timestamp?
A Unix timestamp counts elapsed time from January 1, 1970 UTC, commonly in seconds or milliseconds.
Should I use seconds or milliseconds?
Use the unit expected by your API, database, or log source. Many web APIs use milliseconds while Unix tools often use seconds.
Why does the readable date use my local time?
The browser displays parsed dates in your local time zone for easier debugging.
Can I share a timestamp conversion?
Yes. The URL stores the selected mode and values after you edit the fields.
Does conversion happen client-side?
Yes. Timestamp conversion runs locally in the browser.
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