Epoch / Timestamp Converter
Convert Unix timestamps to human-readable dates in ISO 8601, UTC, and local formats — or convert any date and time back to a Unix timestamp. Supports seconds and milliseconds precision.
Epoch → Date
Date → Epoch
1775770436What is a Unix timestamp?
A Unix timestamp (epoch time) is the number of seconds elapsed since 00:00:00 UTC on 1 January 1970 — the Unix epoch. It's the universal format for representing time in software, free from timezone complexity.
Seconds vs milliseconds
Most Unix systems and languages (C, Python, Go, shell) use seconds. JavaScript's Date.now() returns milliseconds, as do many modern APIs and logging systems. When in doubt, check the number of digits: 10 digits = seconds, 13 = milliseconds.
ISO 8601 format
ISO 8601 (e.g. 2026-04-07T14:30:00.000Z) is the international standard for date-time strings. The trailing Z means UTC. Use this format in APIs and databases to avoid timezone ambiguity.
