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1. validator.w3.orgThe W3C Markup Validation Service

   validator.w3.org

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   Validate the markup validity of web documents in various formats with this online tool. You can also check error pages, verbose output, HTML-Tidy, and other validators for specific content.

   • Docs

     Markup Validator Web Service API. Use the validator from...

   • About

     About this service. The Markup Validator is a free service...

   • non-DTD-based Validator

     Chętnie wyświetlilibyśmy opis, ale witryna, którą oglądasz,...

   • Help FAQ

     The Markup Validator is a free tool and service that...

   • News

     0.8.4 may sound like a very minor step from the version...

   • MobileOK Content

     Be mobile friendly. The Mobile Checker is a tool for Web...

   • W3C RDF Validation Service

     Check and Visualize your RDF documents. olde servlet. Enter...

   • About the W3C Markup Validation Service

     The Markup Validator is a free service by W3C that helps...

2. validator.w3.org › aboutAbout the W3C Markup Validation Service

   validator.w3.org › about

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   The Markup Validator is a free service by W3C that helps check the validity of Web documents written in HTML, XHTML, MathML, SMIL, SVG and other markup languages. It can also validate documents according to ISO standards and provide documentation, feedback and related resources.

3. validator.w3.org › docs › helpHelp for The W3C Markup Validation Service

   validator.w3.org › docs › help

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   Learn how to use the Markup Validator to check the syntax of Web documents written in HTML, XHTML and other languages. Find answers to common questions about validation, error messages, icons and more.

4. www.w3.org › wiki › MarkupValidatorMarkupValidator - W3C Wiki

   www.w3.org › wiki › MarkupValidator

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   7 wrz 2023 · The W3C Markup Validator is an open source software and free W3C service helping Web Document authors fix errors in the markup of their HTML, XHTML, MathML etc. resources.

5. pl.wikipedia.org › wiki › W3C_Markup_Validation_ServiceW3C Markup Validation Service – Wikipedia, wolna encyklopedia

   pl.wikipedia.org › wiki › W3C_Markup_Validation_Service

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   Usługa W3C do sprawdzania zgodności dokumentu HTML ze standardami HTML lub XHTML. Dowiedz się o historii, funkcjach i linkach zewnętrznych tego walidatora.

6. en.wikipedia.org › wiki › W3C_Markup_Validation_ServiceW3C Markup Validation Service - Wikipedia

   en.wikipedia.org › wiki › W3C_Markup_Validation_Service

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   A validator by the W3C that checks HTML and XHTML documents for well-formed markup. Learn about its history, limitations, and other validation tools for web technologies.

7. validator.w3.comvalidator.w3.com

   validator.w3.com

   A tool provided by the World Wide Web Consortium to validate the markup of web documents.