Timestamp Converter
Convert between Unix timestamps and human-readable dates. Live clock, relative time, multiple formats.
Seconds (10 digits) or milliseconds (13 digits)
What is a Unix Timestamp?
A Unix timestamp (also called Epoch time or POSIX time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It's a universal way to represent a point in time as a single number, independent of time zones.
Timestamps are used extensively in programming, databases, APIs, and log files. Common formats are seconds (10 digits, e.g. 1711411200) and milliseconds (13 digits, e.g. 1711411200000). JavaScript's Date.now() returns milliseconds, while Unix date +%s returns seconds.
Seconds vs milliseconds are auto-detected. Converts ISO 8601, UTC, local time, and relative time. Processed locally in your browser.