W3C's most popular service just got better, prettier, faster, and smarter. The W3C Markup Validator has a new user interface and a validation engine with improved accuracy and performance.
Among new features are an automatic cleanup option using HTML Tidy, and checking of HTML fragments. Driven by W3C as an open-source software project, the markup validator is made by Web professionals for Web professionals, and aims to be a major step in any Web development quality process.Link:
http://validator.w3.org/
