Unix Timestamp Converter
Convert Unix timestamps to dates and ISO dates to epoch time. Compare seconds and milliseconds, view UTC or IANA time zones, and retain millisecond precision.
Your result will appear here.
How to convert a Unix timestamp
- Choose seconds, milliseconds or an ISO date with a time zone as the input format.
- Enter the value. For a date, include Z or an offset, such as 2024-01-01T08:00:00+08:00.
- Choose an IANA time zone to view local time, then copy the result. The UTC instant and timestamp stay unchanged.
Working with Unix Timestamp Converter
Unix timestamps identify instants, not local wall-clock times. For date input, include Z or an explicit offset such as +11:00. The display time zone changes how the instant is shown, not the timestamp itself.
Timestamp example: the same instant in seconds, milliseconds and UTC
- Input
1704067200- Result
ISO 8601 · UTC: 2024-01-01T00:00:00.000Z Unix seconds: 1704067200 Unix milliseconds: 1704067200000
Questions about Unix Timestamp Converter
Is my timestamp in seconds or milliseconds?
Check the system that produced it. Around today's dates, seconds commonly have 10 digits and milliseconds 13, but digit count is not a universal rule. Select the correct unit; 1704067200 seconds equals 1704067200000 milliseconds.
Why is the converted date several hours off?
A timestamp has no local time zone. UTC and local clock displays differ by their offset. Select a zone such as Europe/Paris to apply its date-specific rules, including daylight saving time; do not manually add the offset to the timestamp.
Can I convert a date back to a Unix timestamp?
Yes. Choose date input and use ISO 8601 with Z or an explicit offset. An ambiguous date without a zone is rejected instead of being guessed. The result includes Unix seconds and milliseconds.
Are negative and fractional timestamps supported?
Yes. Negative values represent instants before 1970-01-01T00:00:00Z. Seconds can have up to three meaningful decimal places; millisecond input must resolve to whole milliseconds. Finer precision is rejected, not silently rounded.
Are my files, tokens or text uploaded?
No. These tools process your input in your browser. The website serves the page and its code, but your input is not sent to a conversion server or saved in an account.
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