ISO 8601 Date Validator

Summary

Paste any ISO 8601 date/time string and instantly see if it is valid, its parsed components, and equivalent human-readable formats.

How it works

1. Paste or type an ISO 8601 date/time string into the input field.
2. The validator instantly checks the string against the ISO 8601 specification.
3. If valid, parsed components (year, month, day, hour, minute, second, timezone) are displayed.
4. Equivalent formats — UTC string, Unix timestamp, locale date, and relative time — appear below.
5. If the string is invalid, an inline error message explains what went wrong.

Use cases

• Debug API responses that return date/time strings.
• Verify that a date serialized from your database is ISO 8601 compliant.
• Check whether a datetime from a log file is correctly formatted.
• Convert an ISO 8601 string to Unix timestamp or UTC for cross-system comparisons.
• Learn the ISO 8601 format by experimenting with different date strings.
• Validate date inputs before sending them to a REST API.

Frequently Asked Questions