About this tool
Convert a Unix timestamp (in seconds or milliseconds) into a readable date in ISO, UTC and your local time zone, with a relative description like "3 days ago". Type a date and get the timestamp back. Detects seconds vs milliseconds automatically.
Frequently asked questions
Seconds or milliseconds?
Both. The tool auto-detects: long values are treated as milliseconds, shorter ones as seconds.
What is a Unix timestamp?
It is the number of seconds since 1 January 1970 UTC (the Unix epoch), a common way to store time in software.