Unix Timestamp Converter
Convert between Unix timestamps and ISO date-time values in seconds or milliseconds.
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Conversion result
About this tool
Convert Unix time measured from 1970-01-01 00:00:00 UTC into an unambiguous ISO 8601 value, with explicit seconds or milliseconds.
A date string without a timezone is interpreted in the device's local zone. Add Z to specify UTC explicitly.
Frequently asked questions
What is the difference between 10 and 13 digits?
Ten digits usually represent seconds and 13 usually represent milliseconds; select the matching unit.
Is the output in UTC?
Timestamp-to-date output uses UTC ISO format.
Are leap seconds represented?
No. It follows standard JavaScript date behavior.
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