ISO 8601 Converter

Convert between ISO 8601 datetime strings and UNIX timestamps. Fully timezone and milliseconds aware.

ISO 8601 String

UNIX Timestamp

Use Milliseconds

Local Time Equivalent:

Friday, May 22nd, 2026 at 1:23:36 PM GMT+00:00

What is ISO 8601?

ISO 8601 is an internationally accepted way to represent dates and times. It provides a well-defined format avoiding confusion between different national notations. The most common format is YYYY-MM-DDTHH:mm:ss.sssZ where 'T' separates date and time, and 'Z' indicates UTC time.