Unix Timestamp Converter

How it works

Enter a Unix timestamp (number of seconds or milliseconds since January 1, 1970 UTC) to convert it to a human-readable date and time in your local time zone and UTC. Alternatively, select a date and time to get its Unix timestamp in both seconds and milliseconds. The converter auto-detects whether your input is in seconds or milliseconds based on the number length. Results include the formatted date, day of the week, relative time (e.g., 3 days ago), and both timestamp formats.