Unix Timestamp Converter
Convert Unix timestamps to local, UTC, ISO, and relative dates, or convert dates back to timestamps.
Local Time
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UTC
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ISO 8601
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Relative
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What is a Unix timestamp?
A Unix timestamp is the number of seconds since January 1, 1970 at 00:00:00 UTC. It is widely used in APIs, databases, logs, schedulers, and programming languages because it is compact and timezone-independent.
This converter accepts seconds or milliseconds and displays local time, UTC time, ISO format, and relative time. You can also enter a date and convert it back to a timestamp.
Seconds or milliseconds?
Most Unix timestamps are 10 digits in seconds. JavaScript timestamps are usually 13 digits in milliseconds.
Why does local time differ from UTC?
UTC is timezone-neutral. Local time is adjusted by your browser timezone and daylight-saving rules.