Free HTML Formatter

Turn minified or tangled HTML into clean, indented markup. This free formatter understands block versus inline elements, keeps void elements correct, preserves your inline scripts and styles, and lets you choose the indentation — ideal before debugging or code review.

Formatted HTML


    

    

  



  
Private by design. This tool runs 100% in your browser — your code is never uploaded to any server.

  

    
How to Use the HTML Formatter

    
    
      
  1. Paste your HTML — minified, messy, or copied from DevTools.
    2. 
      
  2. Choose your indentation: 2 spaces, 4 spaces, or tabs.
    3. 
      
  3. Click Format HTML to beautify it instantly.
    4. 
      
  4. Copy or download the cleaned-up markup.
    5. 
    

  

  

    
Features

    
The formatter tokenizes real HTML structure instead of guessing: block-level elements increase indentation, inline elements stay on one line, void elements like br and img never get closing treatment, and pre/script/style blocks pass through byte-for-byte so embedded code is never reflowed. Comments are preserved in place and indentation depth is fully configurable.

    
Benefits & Use Cases

    
Developers beautify minified production HTML pulled from “view source” before tracing layout bugs; teams normalize email templates and CMS output to readable form; students study real-world markup comfortably. Local processing means proprietary templates never leave your machine.

    
Tips

    
Formatting changes only whitespace, so it is safe to run on any static markup — but avoid reformatting HTML that relies on whitespace between inline elements (like inline-block nav gaps), since added line breaks can introduce tiny visual spaces.

  

  

    
Frequently Asked Questions

    
What does an HTML formatter do?
It rewrites HTML with consistent indentation and line breaks so nested elements are visually clear — turning one-line minified markup into a readable tree without changing what the browser renders.

    
Will formatting change how my page looks?
Only whitespace between block elements changes, which browsers ignore. One caution: line breaks added between inline elements can introduce small spaces, so check inline layouts after formatting.

    
Are script and style contents safe?
Yes. The contents of script, style, pre, and textarea tags are passed through untouched — embedded JavaScript and CSS are never re-indented or reflowed.

    
Does it fix invalid HTML?
No — it formats structure but does not validate or repair markup. Unclosed tags will simply indent oddly, which itself is a useful visual clue that something is off.

    
Is my HTML uploaded anywhere?
No. Formatting happens entirely in your browser with JavaScript — your markup never leaves your device.

  

  

    
Related Tools

    

      
HTML Minifier
Minify HTML for production with NToolHub’s free minifier. Removes comments and whitespace safely, protects scripts — see savings instantly.
Open tool →
      
HTML to Markdown
Convert HTML to clean Markdown with NToolHub’s free tool. Headings, lists, links, code and tables — fast, private, no sign-up.
Open tool →
      
CSS Formatter
Beautify messy CSS instantly with NToolHub’s free CSS formatter. Clean indentation, readable rules, comment-safe — 100% private in-browser tool.
Open tool →
      
JavaScript Formatter
Beautify minified JavaScript with NToolHub’s free formatter. Smart brace indentation, string-safe — readable code instantly, 100% private.
Open tool →
      
XML Formatter
Format and beautify XML instantly with NToolHub’s free formatter. Validates well-formedness, clean indentation — 100% private.
Open tool →