CSE HTML Validator Professional is a fast, powerful, user configurable, and easy to use web development tool that helps HTML authors create syntactically correct and accessible HTML, XHTML, and CSS documents. A must have for professional and serious HTML developers and business website owners. Supports HTML, XHTML, CSS, WML, accessibility checking (Section 508 and WCAG 1.0), link checking, batch processing, integrated editing, and much more. CSE HTML Validator also provides valuable and customizable advice while pinpointing deprecated and proprietary tags and attributes. Syntactically correct HTML may also offer better search engine placement.

Version 6.51 improves Batch Wizard and fixes some bugs.