xhtml validator
5sec Validator
validate your complete site in seconds validate any URL – post, page, taxonomy or custom post type detailed errors report for HTML detailed errors and warnings report for CSS uses industry-standard validator from W3C a must have for any SEO aware webmaster improve your site’s SEO and speed View live WP demo with admin access Changelog v1.1 - January 3rd 2012 * timestamp display is now formated according to WP locale * minor timeout re...