HTML Markup Validation Bookmarklet

HTML5, CSS3 and JavaScript

The Fine Art of Web Development by Martin Ivanov

 

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Acid.JS Validator is a free bookmarklet that uses the W3C SGML parser’s API to validate the markup of the page on which it is called. To start using the bookmarklet, go to this page and follow the instructions.

To validate a page, simply click the bookmark and you will be presented with a detailed validation report. In you are a chrome user, you can get and install the bookmarklet from Google Web Store.

Screenshots

Validation Success

validator-valid

Validation Failure

validator-invalid

Site Cannot be Checked

validator-uncheckable

Supported Browsers *

* More browsers will be supported soon

To get your HTML markup validation bookmarklet, go to this page and follow the instructions.

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