HTML Validators check HTML against the formal HTML specification published by the World Wide Web Consortium (W3C), giving an error report. HTML Lints check HTML for compatibility with different browsers and screen sizes, download times, spelling, and more. If you are only going to use one, use a validator. HTML which follows the HTML specification will be compatible with the widest audience. For compatibility with disabled users, check your documents against the W3C's Web Site Accessibility Guidelines.
More information
More information
Subcategories 1
Related categories 2
Sites 13
World Wide Web Consortium validator, maintained at W3C by W3C staff and collaborators. Checks the markup validity of Web documents in HTML, XHTML, SMIL and MathML.
Combines the power of HTML Tidy, CSS Tidy, JS Beautify, and the Ace editor to effortlessly clean up code.
Locates webpage coding errors, lists error number and page source.
Cleans up coding errors, especially useful for deeply nested ones.
Removes clutter from Microsoft Word 2000-generated HTML. ASP source code available for purchase.
Checks any website for broken links, spelling errors, browser compatibility, accessibility, web standards validation and search engine issues.
A multi-page validator that checks HTML and CSS. Paid service
JavaScript bookmarklets which check alt text, broken images, small screen readability, and HTML validity.
Validation services for HTML, XHTML, WML, XML, DTD, Schema, RSS and Atom feeds and even Google sitemaps.
Portal to several validators and URL analyzers.
Uncheck tags to be unsupported and see how the page looks.
Checks how a webpage looks with different HTML versions.
Links to validators for XHTML, HTML, CSS, RSS, XML, and RDF documents.
World Wide Web Consortium validator, maintained at W3C by W3C staff and collaborators. Checks the markup validity of Web documents in HTML, XHTML, SMIL and MathML.
A multi-page validator that checks HTML and CSS. Paid service
Combines the power of HTML Tidy, CSS Tidy, JS Beautify, and the Ace editor to effortlessly clean up code.
Validation services for HTML, XHTML, WML, XML, DTD, Schema, RSS and Atom feeds and even Google sitemaps.
Checks any website for broken links, spelling errors, browser compatibility, accessibility, web standards validation and search engine issues.
Locates webpage coding errors, lists error number and page source.
JavaScript bookmarklets which check alt text, broken images, small screen readability, and HTML validity.
Checks how a webpage looks with different HTML versions.
Uncheck tags to be unsupported and see how the page looks.
Portal to several validators and URL analyzers.
Links to validators for XHTML, HTML, CSS, RSS, XML, and RDF documents.
Removes clutter from Microsoft Word 2000-generated HTML. ASP source code available for purchase.
Cleans up coding errors, especially useful for deeply nested ones.
