ISO 8601 Converter

Convert local date-times to ISO 8601 UTC strings and parse ISO strings back.

Local date/time:

Or paste ISO 8601 string:

How to use

Pick a local date/time or paste an ISO string, then click Convert.

What does the Z mean?

Z stands for Zulu time — i.e. UTC. 2026-10-12T12:00:00Z is noon UTC.

Why do developers use ISO 8601?

It is unambiguous across timezones and sorts correctly as plain text.

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