HTML 5 Validator Checks For HTML5 Errors On Any Webpage In Firefox


HTML5 is the next generation of HTML (Hyper Text Markup Language), which is used for the structuring and presentation of content produced on the World Wide Web. HTML 5 Validator is a Firefox extension that allows checking the HTML5 structure (via right click context menu) of any webpage(s) and provides with an overview of any possible errors in the validation process. It functions much like the widely used Firebug extension which is used to debug CSS, HTML, and JavaScript issues.

To inspect for HTML validation issues, right-click a webpage and choose HTML 5 Validation from context menu.

HTML 5 Validator

This will open a separate window with HTML validation information of the web page. In case you are wondering why anyone would use HTML 5 Validation instead of Firebug? The answer is simple. HTML 5 Validation is specifically designed to provide in-depth information about HTML related issues on a webpage (including the under development HTML 5), whereas Firebug despite acting as a comprehensive toolkit for developers can appear quite convoluted. This extension on the contrary provides straightforward and easy to debug information for the HTML5 format of a page.

HTML 5 validation

HTML 5 Validator extension works with Firefox 3.5 – 3.6.*.

HTML 5 Validatior Extension for Firefox