Unix Timestamp Converter
Convert between Unix timestamps and human-readable dates, in UTC or your local time zone.
Timestamp → Date
Date → Timestamp
All conversions happen locally in your browser using your device's clock and time zone data.
Frequently asked questions
How does it know if my timestamp is in seconds or milliseconds?+
By magnitude — a seconds-based timestamp for any date since 2001 is well under a trillion, while a milliseconds-based one for any date after 1970 is well over it. Auto-detect uses that threshold, or you can force either unit explicitly.
What time zone is the date input in?+
Your browser's local time zone, shown next to the field. The result panel also shows the equivalent time in UTC for reference.
Does this use my device's clock?+
Yes — the "Now" button and all conversions use your device's local clock and time zone data, computed entirely in your browser.