general purpose validators
The following validators will validate multiple microformats on a page:
Google Rich Snippets Testing Tool
Google Rich Snippets Testing Tool it can parse microformats from URLs and output the eventual errors found in the same page. Does not support all microformats data but is in a continuous updating process.
Optimus microformats transformer and validator is a microformats transformer and validator that supports numerous microformats including hCard 1.0, hCalendar 1.0, hReview 0.4 (in progress), hAtom 0.1 (note: hAtom validation issues).
Please add issues to the optimus-issues page.
specific microformats validators
- The unofficial hCard Validator
- It's open-source and contributions are welcome! Please join the project and extend it to support more microformats.
microformats: hCard, hCalendar
Operator does a good job of compliant parsing for microformats in general, and includes a debug mode that can help identify errors in the structure.
There has been a suggestion to host an "official" microformats validator at microformats.org.
- hCard validator is open-source (BSD-licensed) and extensible enough to support other microformats (it's mostly a matter of hooking up XSLT templates that extract microformat data and find errors). The codebase is pretty clean, UI is internationalized.
Who wants to help make this happen, and what do you need?