Unix Epoch Converter

Convert between Unix timestamps and human-readable dates. Supports seconds, milliseconds, and microseconds.

What is Unix Epoch Time?

Unix epoch time (also known as POSIX time) counts the number of seconds elapsed since January 1, 1970 at 00:00:00 UTC. It's the standard way computers represent time internally and is used in programming, databases, APIs, and system logs.

Common Precision Levels

  • Seconds (10 digits) — C, Python time.time(), most Unix APIs
  • Milliseconds (13 digits) — JavaScript Date.now(), Java
  • Microseconds (16 digits) — Go, PostgreSQL, Python time.time_ns()