validator.w3.org/about.html

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  • General Meta Tags

    4
    • title
      About the W3C Markup Validation Service
    • Content-Type
      text/html;charset=utf-8
    • keywords
      HTML, HyperText Markup Language, Validation, W3C Markup Validation Service
    • description
      W3C's easy-to-use markup validation service, based on SGML and XML parsers.

  • Link Tags

    4
    • help
    • icon
      https://www.w3.org/assets/logos/w3c-2025/favicons/favicon-32.png
    • start
      ./
    • stylesheet
      ./style/base

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