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

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.

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 development tutorials, examples, exercises, quizzes, reference and much more for various languages including HTML, XML, CSS, Javascript, and PHP

Online tools for developers, including formatters (JSON, XML, HTML, SQL, etc.), minifiers (JavaScript, CSS), validators, compactors and many more!

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.

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The Paciello Group - home page. The leading provider of Web and Software accessibility technology, consulting, and training.

A free HTML syntax checker for Microsoft Windows from the developers of CSE HTML Validator Professional.