The World Wide Web Consortium (W3C) is an international community where Member organizations, a full-time staff, and the public work together to develop Web standards. Led by Web inventor Tim Berners-Lee and CEO Jeffrey Jaffe, W3C's mission is to lead the Web to its full potential. Contact W3C for more information.List of Current W3C Standards
Tutorials from W3C
Basic Validators: Run on all web pages
Unicorn - W3C's Unified Validator
MarkUp Validator - Also known as the HTML validator, it helps check Web documents in formats like HTML and XHTML, SVG or MathML.
Link Checker - Checks anchors (hyperlinks) in a HTML/XHTML document. Useful to find broken links, etc.
CSS Validator - validates CSS stylesheets or documents using CSS stylesheets.
Log Validator: The above three can be used all-in-one by running this validator
Specific Tools - for Specific Needs
Semantic Extractor
Log Validator: The above three can be used all-in-one by running this validator
Specific Tools - for Specific Needs
Semantic Extractor
Sees a Web page from a semantic point of view.
Extracts such information as outline, description, languages used, etc.
Checks and Visualize RDF documents
Checks newsfeeds in formats like ATOM and RSS.
Checks whether a site is P3P enabled and controls protocol and syntax of Policy-Reference-File and Policy
XML Schema Validator
for testing mobile sites
