Unix Timestamp Converter

Convert Unix timestamps (seconds or milliseconds) to UTC and local dates, and dates or ISO 8601 strings back to timestamps.

Result

Unix time counts seconds since 1970-01-01 00:00:00 UTC. 13 digits means milliseconds.

How it works

Seconds vs milliseconds is detected from the length.
ISO 8601 strings are accepted.

Results are estimates for reference only. Please confirm important decisions with the relevant authority or a professional.