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W3C

This is a free, online HTML validator. Instead of validating one document at a time, enter a Starting URL and our robot does the work

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Total Validator is an (X)HTML validator, an accessibility validator, a spell checker, and a broken links checker all rolled into one tool allowing one-click validation of your entire site.

HTMLHelp.com is maintained by the Web Design Group to provide Web authoring reference material, tips, and answers to frequently asked questions.

Main Page,About WordPress,Advanced Topics,Backing Up Your Database,Backing Up Your WordPress Files,Blog Design and Layout,CSS Troubleshooting,Contributing to WordPress,Database Description,Developer Documentation,Documentation team

CSE HTML Validator is a powerful and easy to use offline HTML, XHTML, CSS, JavaScript, and PHP syntax checker, HTML validator, XHTML validator, accessibility checker, and link checker for Microsoft Windows. A free edition is also available.

Web Link Validator is a link checker and site management tool that helps webmasters automate the process of website testing.

Web Design and HTML are all about creating a great Web site. Use Web development and Web site design to build Web sites that customers return to over and over again. On this site learn the basics of Web design, HTML, XML, and Web development.