What is a Unix timestamp?

A Unix timestamp (epoch time) is the number of seconds elapsed since 00:00:00 UTC on 1 January 1970. It is the standard way to represent moments in time in computing and APIs.

How do I convert a Unix timestamp to a readable date?

Enter the timestamp (seconds or milliseconds) in the Unix Timestamp Converter. The tool shows the equivalent date and time in UTC and in your local timezone.

What is the difference between second and millisecond timestamps?

Standard Unix timestamps are in seconds (10 digits, e.g. 1700000000). JavaScript's Date.now() returns milliseconds (13 digits). The converter detects the format automatically.

What is the Unix timestamp Year 2038 problem?

Signed 32-bit timestamps overflow on 19 January 2038 (the 'Year 2038 problem'). Systems using 64-bit storage handle timestamps well beyond the year 292 billion.

Unix Timestamp Converter — Epoch ↔ Date