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HTML Prettify – Free Online HTML Formatter & Beautifier

Weaving in free online HTML formatter, no signup, private, and browser-based. 


    

      
    

  












  Experience the next level of HTML formatting with our Ultimate HTML Prettify
  tool. Our browser-based formatter instantly indents, highlights, and
  beautifies your raw HTML, CSS, and JavaScript—all without sending your code
  anywhere. Enjoy unlimited, private use with no sign-ups or restrictions, and
  streamline your workflow with one-click formatting and copying.





  
Why Choose HTML Prettify: Pros & Cons

  

    Looking for the best HTML code formatter online free? HTML
    Prettify is a browser-based HTML prettify tool that
    delivers instant,
    syntax-highlighted HTML formatter capabilities—no signup
    required. Below, we break down the key benefits and drawbacks so you can
    decide if it’s the right free online HTML formatter for your workflow.
  


  
Pros

  
    
    
  • 
      100% Free & No Signup – Use our HTML beautifier with
      syntax highlight at zero cost and without creating an account.
    
    • 
    
  • 
      Local & Private – All formatting happens client-side in
      your browser, so your code never leaves your device.
    
    • 
    
  • 
      Multi-Language Support – Formats HTML, inline CSS, and
      JavaScript in one go, making it a versatile online code beautifier.
    
    • 
    
  • 
      Instant Results – Lightning-fast performance even on
      large snippets; ideal as an online formatter for rapid
      prototyping.
    
    • 
    
  • 
      Easy Copy – One-click “Copy Pretty HTML” and “Copy”
      buttons streamline your development workflow.
    
    • 
    
  • 
      Standards Compliance – Ensures your code aligns with the
      official
      W3C HTML5 specification.
    
    • 
    
  • 
      Improved Collaboration – Consistent formatting enforces a
      uniform style, making it easier for teams to read and review code.
    
    • 
    
  • 
      Enhanced Accessibility – Well-structured, semantic HTML
      supports screen readers and accessibility audits.
    
    • 

    
  • 
      Syntax Highlighting Benefits – Colour-coding reduces
      comprehension time and helps spot errors quickly.
    
    • 
    
  • 
      Open Source Friendly – Perfect for GitHub snippets, blog
      posts, and StackOverflow answers that require well-formatted code.
    
    • 
  


  
Cons

  
    
    
  • 
      No Bulk Batch Processing – You can only format one
      snippet at a time; there’s no multi-file upload.
    
    • 
    
  • 
      Indent Size Fixed by Script – Default is two spaces;
      changing indentation requires editing the indentSize
      variable manually.
    
    • 
    
  • 
      Ads Displayed – The tool is ad-supported, which may be
      distracting to some users.
    
    • 
  


  

    For complete HTML reference and best practices, see the
    MDN Web Docs: HTML guide.
  





How To Use HTML Prettify



  
    
    
  1. 
      Paste Your Code: In the top textarea, paste your raw HTML
      (or HTML with inline CSS/JS).
    
    2. 
    
  2. 
      Click “Prettify”:  Hit the “Prettify” button to
      auto-format and syntax-highlight your code.
    
    3. 
    
  3. 
      Review Formatted Output: See the indented, color-coded
      result appear in the output pane.
    
    4. 
    
  4. 
      Copy to Clipboard: Click either “Copy” or “Copy Pretty
      HTML” to copy the beautified code.
    
    5. 
    
  5. 
      Adjust Settings (Optional): If you need a different
      indent size, open the script and tweak the indentSize value.
    
    6. 
  








FAQs



  
  

    What is HTML Prettify?
    

      

        HTML Prettify is a free online HTML formatter and beautifier that
        formats your HTML, CSS, and JavaScript code with syntax highlighting
        directly in your browser.
      

    

  


  
  

    How do I use the free online HTML formatter?
    

      

        Paste your raw HTML into the input box, click “Prettify,” and view the
        formatted, color-coded code in the output pane. Then click “Copy” to
        copy it to your clipboard.
      

    

  


  
  

    Does it support CSS and JavaScript formatting?
    

      

        Yes—built-in CSS and JS formatters correctly indent and highlight rules,
        functions, and control structures inside <style> and
        <script> tags.
      

    

  


  
  

    Is my code secure and private?
    

      

        Absolutely. All formatting happens locally in your browser—your code
        never leaves your device.
      

    

  


  
  

    Do I need to install any software?
    

      

        No installation is required. HTML Prettify runs entirely in your web
        browser using HTML5 and JavaScript.
      

    

  


  
  

    Can I batch format multiple snippets?
    

      

        You can format one snippet at a time—there’s no limit on usage, and each
        formatting is immediate.
      

    

  


  
  

    How do I copy the formatted code?
    

      

        After formatting, click the “Copy” or “Copy Pretty HTML” button to copy
        the result to your clipboard in one click.
      

    

  


  
  

    Does it preserve comments and special tags?
    

      

        Yes, comments and content inside <script>, <style>,
        <pre>, and <code> tags are preserved and indented correctly.
      

    

  


  
  

    Can I customize the indentation size?
    

      

        The default is two spaces. To change it, adjust the
        indentSize variable in the script before use.
      

    

  


  
  

    What browsers are supported?
    

      

        Any modern browser with HTML5 and JavaScript support—Chrome, Firefox,
        Safari, Edge, and more.
      

    

  


  
  

    Is HTML Prettify completely free with no signup?
    

      

        Yes—HTML Prettify is 100% free, ad-supported, and requires no account or
        payment.