Unix timestamp converter
Epoch seconds or milliseconds to readable dates, both directions, with the current timestamp ticking live.
Timestamp → date
Date → timestamp
Frequently asked questions
What is a Unix timestamp?
The number of seconds since midnight UTC on January 1, 1970 (the "epoch"). It is the standard machine representation of time: timezone-free, sortable, and arithmetic-friendly. 1,000,000,000 landed in September 2001; 2,000,000,000 arrives in 2033.
Seconds or milliseconds, how do I tell?
Length: current timestamps are 10 digits in seconds and 13 in milliseconds. This tool auto-detects by size and shows which it assumed. JavaScript uses milliseconds; most Unix tools and APIs use seconds.
What is the year-2038 problem?
Signed 32-bit integers overflow at 2,147,483,647, which is January 19, 2038 in epoch seconds. Modern 64-bit systems are unaffected, but old embedded systems storing time in 32 bits will wrap around.