Date to ISO 8601 Converter

Normalize common dates into timezone-aware ISO 8601

Date to ISO 8601 Converter

Date to ISO 8601 Converter

Auto-detects ISO 8601, Unix timestamp, RFC 2822, and common date formats

Converted Formats

Related Tools

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Overview

Normalize common date strings, Unix timestamps, RFC 2822, HTTP dates, and SQL-style values into ISO 8601. Select the target timezone explicitly to produce an API-ready value with a visible offset and consistent UTC alternative.

How It Works and Key Features

Enter a date such as Sat, 09 Mar 2024 15:30:00 GMT, choose the timezone, and copy the highlighted ISO 8601 output. The same instant is also shown as local time, UTC, date-only, week-date, Unix, RFC 2822, and HTTP formats; processing stays in the browser.

Examples and Use Cases

Prepare request bodies for REST or GraphQL APIs, normalize imported CSV dates, migrate database fixtures, or compare dates from systems with different conventions. The sample above becomes 2024-03-09T15:30:00.000Z when UTC is selected.

Edge Cases and Limitations

Numeric day/month formats such as 03/09/2024 can be locale-ambiguous, and a date without an offset uses the selected or browser zone. Date-only values resolve at midnight. DST transitions, browser timezone data, and JavaScript millisecond precision can affect edge results; leap seconds are not represented.

Reverse Conversion

Have an ISO 8601 value that needs a readable display? Open ISO 8601 to Date for strict ISO parsing and local, UTC, calendar, and relative-time output.