Unix Epoch Timestamp

Convert Unix epoch seconds and milliseconds to human-readable dates, and vice versa. Live real-time clock display.

Live Clock System Seconds

Updating...

Convert Epoch to Date

Outputs will show here

Convert Date to Epoch

Outputs will show here

What is a Unix Timestamp?

The Unix timestamp (also called Unix time, POSIX time, or epoch time) is a system for describing a point in time. It is the number of seconds that have elapsed since the Unix epoch — January 1, 1970, 00:00:00 UTC — minus leap seconds.

Seconds vs Milliseconds

Unix timestamps are traditionally measured in seconds. However, many modern programming languages and APIs (including JavaScript's Date.now()) use milliseconds. Our converter automatically detects whether your timestamp is in seconds or milliseconds based on its magnitude.

Common Programming Uses

Storing dates in databases as integers (efficient, timezone-agnostic)
JWT token expiration (exp claim)
Log file timestamps for precise sorting
Calculating time differences and durations
API responses and event scheduling