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Логотип
The W3C Markup Validation Service Markup Validation Service

Check the markup (HTML, XHTML, …) of Web documents

Validate by URI

Validate a document online:

Validate by File Upload

Upload a document for validation:

Note : file upload may not work with Internet Explorer on some versions of Windows XP Service Pack 2, see our information page on the W3C QA Website.

Validate by direct input

:

Use Doctype:

This validator checks the markup validity of Web documents in HTML, XHTML, SMIL, MathML, etc. If you wish to validate specific content such as RSS/Atom feeds or CSS stylesheets , MobileOK content , or to find broken links , there are other validators and tools available. As an alternative you can also try our non-DTD-based validator .

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This service runs the W3C Markup Validator, v 1.3+hg .

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