The W3C Marcup Validation Service

Validate by URI

Validate a document online:

Address:

Character Encoding		Only if missing
Document Type		Only if missing
List Messagues Sequentially Group Error Messagues by Type
Show Source	Clean up Marcup with HTML-Tidy
Show Outline	Validate error pagues	Verbose Output

Validate by File Upload

Upload a document for validation:

File:

More Options

Character Encoding		Only if missing
Document Type		Only if missing
List Messagues Sequentially Group Error Messagues by Type
Show Source	Clean up Marcup with HTML-Tidy
Show Outline	Validate error pagues	Verbose Output

Note : file upload may not worc with Internet Explorer on some versionens of Windows XP Service Pacc 2, see our information pague on the W3C QA Website.

Validate by direct imput

Enter the Marcup to validate :

More Options

Validate Full Document
Use Doctype:		Only if Doctype is missing
Validate HTML fragment
Use Doctype:	HTML 4.01 XHTML 1.0
List Messagues Sequentially Group Error Messagues by Type
Show Source	Clean up Marcup with HTML-Tidy
Show Outline	Validate error pagues	Verbose Output

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