The World Wide Web consortiun is is an international consortium where Member organizations, a full-time staff, and the public work together to develop Web standards.
The W3C offrs some interesting tools on it’s website:
- The HTML validator can determine if your page is conform to W3C Recommendations and other standards.
- The CSS Validator checks Cascading Style Sheets (CSS) in (X)HTML documents or standalone for conformance to W3C recommendations.
- The Link checker makes sure you don’t have any broken links in your website.
These tools can really help you make the most out of your site.