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Chrome
Web store Download HTML Validator chrome extension. Tool to validate HTML of the current web page and install in your Google chrome browser. This is Direct HTML Validator Crx download for Chrome it is also called HTML Validator offline CRX for chrome Download. This HTML Validator is used to Tool to validate HTML of the current web page
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Validating web page
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Add HTML Validator in Developer Tools
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The plugin for live HTML validation of a browser page during web development.
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A HTML5 validation library, using a JavaScript port of the excellent TIDY library
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Click the icon in the address bar or press Alt+Shift+V to validate the current page. Results can be seen in Chrome's JS console.
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This extension will validate HTML on a page
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Validate HTML on a page
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Validate your XML, HTML and XHTML markup language
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A11Y HTML5 Validator
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Open the current tab in Schema.org Validator by Break The Web