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HTML Guide

Free site validation

Find out what web pages on your sites are affected by HTML issues.

Bad value “” for attribute “src” on element “iframe”: Must be non-empty.

An <iframe> element allows to embed an HTML document inside another HTML document, and its src attribute is indicated the source URL of the embedded web page. The src attribute is a required attribute, so it cannot be blank.


<iframe src=""></iframe>

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Related W3C validator issues