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Unix time converter
Convert Unix timestamps and explicit-zone ISO dates in UTC.
Unix seconds, Unix milliseconds, ISO date with UTC offset
UTF-8 text
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Your input and output are processed in this browser. They are not uploaded for processing. No account is required.
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How to use this tool
- Choose the conversion direction and timestamp unit.
- Enter a Unix timestamp or an ISO date with seconds and an explicit Z or UTC offset.
- Run the tool to view the UTC date and both timestamp units.
Examples
0 seconds → 1970-01-01T00:00:00.000Z
Limitations
UTC output, not local timezone guesses.
Seconds allow up to three decimal places; leap seconds are unsupported.
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