The W3C Markup Validation Service

This form allows you to enter a URL and have it validated. If you want to validate a file on your computer, you can use the File Upload Interface.

Validate by URL

Address:
Encoding:		Use Fallback instead of Override
Doctype:		Use Fallback instead of Override
Options (Help):	Show Source	Show Outline
Options (Help):	Validate error pages	Verbose Output

Feedback: The W3C Validator Team

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