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- 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, MobileOK content, or to find broken links, there are other validators and tools available
- Free Online HTML Validator - FreeFormatter. com
This free online HTML validator lets you validate your files against the w3c standards
- JSONLint - The JSON Validator
JSONLint is an online editor, validator, and formatting tool for JSON, which allows you to directly type your code, copy and paste it, or input a URL containing your code
- validator. w3. com
Online tool for validating web documents against W3C standards
- HTML Validator - Check Validate HTML Code Online
An HTML validator is a tool that checks your markup to make sure it follows the standard rules of the HTML language It acts like a proofreader for your code, catching things like unclosed tags, missing attributes, or improper nesting, which helps ensure your website is built correctly
- HTML Validator - HTMLStrip
It is a simple free HTML validator which is based on specifications provided by w3 org This tool provides guidance on markup errors and best practices on Web documents in HTML, XHTML, SMIL, MathM in a clean and easy to read format
- HTML Validator - CSS Portal
Free online HTML validator built by CSSPortal Validate HTML5 code instantly in your browser - no data sent to third-party servers Checks structure, accessibility, deprecated tags, nesting, forms, and more
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