WP-Validate indexes your site, collecting all the blog posts, pages and other published content, and submits it to the W3C's HTML Validator, which then returns the response.
WP-Validate then lists the valid pages, and the invalid pages, with a link to the specific validator URL.
Installing WP-Validate is really, really easy.
- Decompress the archive
- Move the
/wp-validate folder to the /wp-content/plugins directory
- Active the plugin in the WordPress Administration Panel