Web Directory

» Alpine HTML Doctor
   Identifies common HTML code errors, corrects the code, and generates a repair file for cut and paste back into a document.
   http://www.alpineinternet.com/.docs/pg/11133

» Dr. Watson
   Checks HTML code, links, spelling, download time and link popularity.
   http://watson.addy.com/

» HTML Code Cleanup
   Validator and hand cleanup by professionals.
   http://www.htmlcodecleanup.com/

» HTML Tidy Download
   HTML Tidy plugin. Fixes HTML and XHTML, converts HTML to XHTML.
   http://chami.com/html-kit/tidy/

» HTML Tidy Online
   Cleans up coding errors, especially useful for deeply nested ones.
   http://infohound.net/tidy/

» HTML and XHTML Syntax Checker
   Locates webpage coding errors, lists error number and page source.
   http://www.freehtmlvalidator.com/onlineval.php

» HTML/XML Validator
   Validates and repairs HTML, XHTML, and XML. Also includes accessibility checking.
   http://validator.aborla.net/

» Microsoft Word 2000 HTML Mess Cleaner
   Removes clutter from Microsoft Word 2000-generated HTML. ASP source code available for purchase.
   http://www.algotech.dk/word-html-cleaner-input.htm

» Pure PHP XHTML Validator
   PHP class for validating XHTML documents. Source code available under LGPL.
   http://www.bermi.org/xhtml_validator

» Total Validator
   Validator for WAI, XHTML, and HTML. Also checks for broken links and spelling mistakes.
   http://www.totalvalidator.com/

» Validation Bookmarklets
   Javascript bookmarklets which check alt text, broken images, small screen readability, and HTML validity.
   http://www.squarefree.com/bookmarklets/validation.html

» Validator-Lite
   Offers validator for HTML, XHTML, and DTD-based XML languages.
   http://www.webthing.com/software/validator-lite/

» Validome Markup Validation Service
   Multilingual validator for HTML, XHTML, and XML.
   http://www.validome.org/

» W3C HTML Validation Service
   World Wide Web Consortium validator.
   http://validator.w3.org

» Walidator
   Portal to several validators and URL analyzers.
   http://www.walidator.com/

» Web Mechanic
   Validator and lint eliminates redundant or conflicting tags and compresses image files. Pay service.
   http://www.webmechanic.com.au/

» Web Page Backward Compatibility Viewer
   Uncheck tags to be unsupported and see how the page looks.
   http://www.delorie.com/web/wpbcv.html

» Web Page Purifier
   Check how a webpage looks with different HTML versions.
   http://www.delorie.com/web/purify.html

» Web Validators
   Links to validators for XHTML, HTML, CSS, RSS, XML, and RDF documents.
   http://validator.czweb.org/

» XHTML CSS
   Helps checking and suggesting corrections to web pages markup (HTML) and style (CSS) coding.
   http://xhtml-css.com/