ISO 8601 Date Formatter

Enter an ISO 8601 date string or click Now to see formatted ISO, local datetime, and Unix timestamp.

—ISO 8601
—Local datetime
—Unix timestamp

How to use

  1. Enter an ISO 8601 date string or click Now for current time.
  2. See formatted ISO output, local datetime, and Unix timestamp.
  3. Use outputs for APIs, logs, and database timestamps.

Frequently asked questions

What ISO 8601 formats are supported?

Full datetime with timezone offset, UTC Z suffix, and date-only formats like 2025-06-28.

What does the Now button do?

Inserts the current date/time and shows all format conversions instantly.

How is local time determined?

Uses your browser timezone via the Intl API.

Is my data sent to a server?

No. Formatting happens entirely in your browser.

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