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WebThis validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets, MobileOK content , or to find broken links, there are other validators and tools available. As an alternative you can also try our non-DTD-based validator . Web14 feb. 2024 · Markup Validation Service . color names . 1 < h1-h6 > This element tells the browser about the structure of your website. h1 elements are often used for main … WebMarkup validation is an important step towards ensuring the technical quality of web pages. The Markup Validator is a free service that helps you to check the validity of websites … dvd drivers windows 10 hpdvd sh216