The World Wide Web Consortium Info on developments in HTML, CSS, internationalization, math markup, security, XML, and more. The official specs are difficult to understand, but sometimes you will need to consult them rather than rely on unofficial interpretations. This program shows what your page will look like in text-only browsers. To see how your page would look in Lynx 2.7.1, use lynx-me . NetMechanic HTML Toolbox NetMechanic will test your links and alert you to possible problems.
Results are easy to read and double-check.
Takes about 5 minutes to check 30 links. Because this is sponsored by the W3C, it checks your document against the most recent and authoritative specifications. Explains any errors it finds in your HTML markup. This guide is designed to help you create a WWW hypertext database that effectively communicates your knowledge to the reader. Despite the disclaimer at the top of this document, this style guide has held up well over the years.