Unix Timestamp Converter
Built for developers, this tool runs 100% locally in your browser. Nothing you enter is sent to a server — there is no backend database, keeping every test fully compliant with data-security best practices.
Result
FAQ
Q: How does this tool know if my timestamp is in seconds or milliseconds?
A: It counts the digits: 10-digit timestamps (covering dates from 2001 to 2286) are treated as seconds, and 13-digit timestamps are treated as milliseconds, which is how most databases and JavaScript's Date.now() represent time.
Q: Why do UTC and local time show different values for the same timestamp?
A: A Unix timestamp itself has no timezone — it's just a count of seconds/milliseconds since 1970-01-01 00:00:00 UTC. UTC time and local time are two different human-readable representations of that same instant, offset by your browser's detected timezone.