general purpose validators
The following validators will validate multiple microformats on a page:
Barnaby Walter has a hosted version of the open source php-mf2 Microformats Parsers at:
It currently supports parsing and displaying the canonical JSON for:
Bing Markup Validator
The Bing Markup Validator tests for various microformats support, including hCard 1.0, hCalendar 1.0, and others. Note: 2012-02-03 launch announcemnt: Bing Webmaster Center blog: Webmaster Tools Markup Validation Tool
Google Rich Snippets Testing Tool
The Google Rich Snippets Testing Tool can parse several microformats from a given URL and produces reports showing errors and a preview of what properties it detects. It supports a subset of properties on some microformats, however is continuously updated with more support.
Yandex microformats validator
The Yandex microformats validator parses several microformats from a URL and shows what properties it detects and/or needs.
browser microformat readers
Mozilla Firefox Extensions has several add-ons you can use with microformats, such as Operator.
Microformats for Google Chrome automatically detects most of the common microformats as you browse. Microformats: hCard 1.0, hCalendar 1.0, hReview 0.4 (in progress), hReview-aggregate 0.2, hRecipe 0.22, Geo
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.
- Save to foursquare tester checks your hCard to see what it can parse from it.
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?
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).
Optimus validator is not working for the moment
Therefore any page you will check through will return the message: "Microformats at this page have no errors. Congratulations." which is a false message. We will update this message when (and if) Optimus will work again.
Please add issues to the optimus-issues page.