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Home / HTML Validation Tool

HTML Validation Tool

Use this tool to easily check your web page's HTML for validity. Supports HTML 4.0 transitional, strict, XHTML, XML, and even legacy doctypes as well.

URL of page: OR
Upload a file:
Doctype:
   
Optional:
Show HTML Source. Show Outline of page using H1 - H6 elements on the page.
Show SGML Parse Tree. Suppress attributes from the parse tree to make it more readable.