Date & time
Unix timestamp converter
Convert seconds or milliseconds to an exact UTC ISO date and back.
Processed locally
Choose units explicitly. ISO input requires a four-digit year and trailing Z. Seconds allow at most three fractional digits.
Your answer will appear here.
Help and method
Use YYYY-MM-DDTHH:mm:ss[.sss]Z. UTC conversion validates calendar dates; local zones and UTC offsets are not accepted. No unit is inferred from the number of digits.
Methods and reliabilityWorked example
An example you can try or adapt to your own values.
- Direction
- Unix to ISO
- Unit
- Seconds
- Input
- 0
Result
1970-01-01T00:00:00.000Z