Convert Unix timestamps to readable dates and back, free. Paste a timestamp (seconds or milliseconds auto-detected) or a date, and get both directions instantly.
A Unix timestamp counts seconds since 1 January 1970 (the epoch). Paste a timestamp and the tool converts it to a readable date, auto-detecting whether you gave seconds (10 digits) or milliseconds (13 digits). It works the other way too: type a date and get the timestamp back in both seconds and milliseconds, plus ISO 8601, each with a copy button.
By default dates are shown in your device's local timezone. Tick the UTC box to see the same moment in Coordinated Universal Time instead, which is what servers and APIs usually log. The timestamp itself is always timezone-free: the same number everywhere on Earth.