Unix timestamp converter
Convert Unix seconds or milliseconds to UTC and local time, or convert an ISO date to a timestamp.
How it works
Use a number with the selected unit, or an ISO date such as 2026-10-11T12:00:00Z. Date inputs must include Z or an explicit offset such as -05:00. Results include UTC and your browser’s local time zone.
Your input and results stay in this browser. Settings links contain options only, never input or generated results.