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  1. The W3C Markup Validation Service

    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, …

  2. Free Online HTML Validator - FreeFormatter.com

    HTML Validator Validates HTML files for compliance against the W3C standards and performs linting to assess code quality against best practices. Find missing or unbalanced HTML tags in …

  3. HTML Validator - HTMLStrip

    HTML Validator. Use this free tool to check HTML documents for validity according to the W3C standards. Upload HTML for local projects or use an address on the internet.

  4. HTML Validator Online - AppDevTools

    HTML Validator is a free online developer tool to validate HTML code against the W3C standards as known as HTML linter instantly. Supports partial HTML code validation. You can either …

  5. HTML Validator - Static.app

    An HTML Validator is an online tool that checks your HTML code for errors and ensures it meets web standards set by the W3C (World Wide Web Consortium). It helps you maintain high code …

  6. HTML Validator - GeeksforGeeks

    Sep 6, 2024 · Validate your HTML code with our HTML Validator tool to detect errors and ensure compliance with web standards. Improve site performance, accessibility, and SEO by …

  7. Free HTML Validator - Check & Fix HTML Code Online

    Mar 9, 2025 · Validate HTML code fast with our free HTML Validator tool at https://webdesignsutra.com/html-validator/. Check HTML syntax errors, fix missing tags, and …

  8. HTML Validator - CSS Portal

    Online HTML validator is a webool that checks the HTML (Hypertext Markup Language) code of a web page to ensure that it conforms to the official HTML specifications and standards defined …

  9. HTML Validator - EZ Tools

    HTML Validator. Validate your HTML against W3C standards and best practices quickly and easily. Improve your web pages with our free online tool.

  10. HTML Validator / HTML Code Checker - Minifier

    HTML Validator is an online HTML checker tool that checks HTML documents to ensure they follow the World Wide Web Consortium (W3C) rules. It examines the HTML code for errors …

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