With that in mind, when I have developed my Google Chrome HTML Validator extension, I wanted to add the options to support automatic or manual HTML validation, for both local, i.e. non-publicly available, and public content.
Display one of 3 icons (valid, warning(s), error(s)) in navigation bar related to validity of (x)HTML document currently shown. Errors/warnings can be displayed as page popup or with every details returned from w3c in a new tab.
HTML Validator is an even more advanced HTML validator extension for Chrome which adds it’s own error reporting overview window to the bottom of the screen.
Web Design / Graphics is indeed a difficult task, but with Google Chrome Extensions below can facilitate your work to make it faster and easier. hope this will be useful.
DNSSEC Validator extension for Google Chrome adds a new functionality to your browser.
For developers, webmasters, and people dealing with HTML coding out there, here is an interesting Google Chrome extension that can help you with your tasks better.
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.
Google Chrome extension v2.5 [License] [Recent changes] [Documentation].
Validity can be used to quickly validate your HTML documents from the address bar. Just click the icon in the address bar to validate the current document without leaving the page.
In Firefox, there's a Extension called “Html Validator”.