Convert Unix timestamps to readable dates and back, and see the same instant across timezones.
Paste a timestamp or a date string. Whether a number is seconds or milliseconds is inferred from its magnitude, so a 10-digit value is read as seconds and a 13-digit one as milliseconds.
The same instant is then rendered in a set of common timezones, which is the fastest way to work out what a log line written in UTC means where you are.
What is the Unix epoch? Midnight UTC on 1 January 1970. A Unix timestamp counts the seconds elapsed since then, ignoring leap seconds.
Is my timestamp in seconds or milliseconds? A present-day value in seconds is 10 digits; in milliseconds it is 13. This tool picks the interpretation automatically.