๐ ISO 8601 Validator/Parser
Supports YYYY-MM-DD, or YYYY-MM-DDTHH:mm:ss[.fff](Z|ยฑHH:MM).
โ Valid ISO 8601
| Year | 2025 |
| Month | 01 |
| Day | 01 |
| Hour | 00 |
| Minute | 00 |
| Second | 00 |
| Timezone | Z |
Enter a date or date-time string to validate whether it conforms to the international standard ISO 8601 format, and if valid, break it down into its year, month, day, time, and timezone components. Handy for checking the timestamp format used by an API response or log.
How to use
- Enter the date/time string you want to validate.
- Whether it's valid ISO 8601 and its components are shown automatically.
FAQ
What is ISO 8601?
It's an international standard for representing dates and times, with common forms like "YYYY-MM-DD" (e.g. 2025-01-01) and "YYYY-MM-DDTHH:mm:ssZ" for date-time with a timezone.
How are nonexistent dates (like February 30) handled?
Even if the format looks correct, a calendar date that doesn't actually exist (e.g. February 30, 2025) is judged invalid. February 29 is only judged valid in an actual leap year.
What range of ISO 8601 formats are supported?
Date-only (YYYY-MM-DD) and date-time formats including hours, minutes, seconds, fractional seconds, and timezone (Z or ยฑHH:MM) are supported. Week-date format (YYYY-Www) and duration format are not covered.