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Unix timestamp converter
Convert seconds, milliseconds and dates with explicit UTC and local time.
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How it works & common questions
Seconds or milliseconds?
Unix time counts from 1970-01-01 00:00:00 UTC. Choose seconds or milliseconds explicitly; the tool does not guess based on digit count.
Which time zone is used?
Date input must include Z or an explicit offset, such as 2026-10-28T12:00:00+08:00. Results include UTC, browser-local time and the local time-zone name.