FREE · TIME & DATE TOOLS
Unix Timestamp Converter.
Convert Unix seconds or milliseconds to UTC dates and back.
How to use Unix Timestamp Converter
Choose direction and seconds or milliseconds, enter a value, then convert.
How it works
Unix timestamps count elapsed time since 1970-01-01 at UTC. Millisecond values are one thousand times second values. Stating UTC avoids local-zone ambiguity; daylight saving does not alter the timestamp itself.
Example
0 Unix seconds → 1970-01-01T00:00:00.000Z.
Questions about Unix Timestamp Converter
Is Unix Timestamp Converter free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
Dates must be valid; date input is UTC. Leap seconds are not represented. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.