HTML Beautifier

Beautify HTML code online for free. Our HTML formatter adds proper indentation, consistent spacing, and clean line breaks to make your markup readable and maintainable. Supports all HTML elements, void tags, inline CSS and JavaScript, comments, and custom formatting options - no signup required.

HTML Beautifier / Formatter

Beautify and format messy, minified, or poorly indented HTML into clean, readable markup with proper indentation, consistent spacing, and clean line breaks. Supports all HTML elements, inline CSS/JS, and custom formatting options. All processing runs locally in your browser - no signup required.

Indent:

Char:

Preserve CommentsWrap Attributes

Input: 1,277 bytesOutput: 3,060 bytes+1,783 bytes (140% increase)

HTML Input1,277 bytes

<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1.0"><title>My Page</title><link rel="stylesheet" href="styles.css"></head><body><header id="top"><nav><ul><li><a href="/">Home</a></li><li><a href="/about">About</a></li><li><a href="/contact">Contact</a></li></ul></nav></header><main><section class="hero"><h1>Welcome to My Website</h1><p>This is a paragraph of text that demonstrates how the HTML beautifier can reformat messy, minified, or poorly indented HTML into clean, readable, and properly structured output with consistent indentation.</p><button class="btn btn-primary" id="cta" data-action="signup" aria-label="Sign up now">Get Started</button></section><section class="features"><article><h2>Feature One</h2><p>Description of feature one with <a href="/features/one">more details</a> and <strong>important</strong> highlights.</p></article><article><h2>Feature Two</h2><p>Description of feature two with <a href="/features/two">more details</a> and <em>emphasized</em> points.</p></article></section></main><footer><p>&copy; 2026 My Website. All rights reserved.</p><ul><li><a href="/privacy">Privacy Policy</a></li><li><a href="/terms">Terms of Service</a></li></ul></footer></body></html>

Beautified HTML Output

3,060 bytes

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width,initial-scale=1.0">
    <title>My Page</title>
      <link rel="stylesheet" href="styles.css">
    </head>
      <body>
        <header id="top">
          <nav>
            <ul>
              <li>
                <a href="/">Home</a>
                </li>
                  <li>
                    <a href="/about">About</a>
                    </li>
                      <li>
                        <a href="/contact">Contact</a>
                        </li>
                        </ul>
                        </nav>
                        </header>
                          <main>
                            <section class="hero">
                              <h1>Welcome to My Website</h1>
                                <p>This is a paragraph of text that demonstrates how the HTML beautifier can reformat messy, minified, or poorly indented HTML into clean, readable, and properly structured output with consistent indentation.</p>
                                  <button class="btn btn-primary" id="cta" data-action="signup" aria-label="Sign up now">Get Started</button>
                                  </section>
                                    <section class="features">
                                      <article>
                                        <h2>Feature One</h2>
                                          <p>Description of feature one with <a href="/features/one">more details</a> and <strong>important</strong> highlights.</p>
                                          </article>
                                            <article>
                                              <h2>Feature Two</h2>
                                                <p>Description of feature two with <a href="/features/two">more details</a> and <em>emphasized</em> points.</p>
                                                </article>
                                                </section>
                                                </main>
                                                  <footer>
                                                    <p>&copy; 2026 My Website. All rights reserved.</p>
                                                      <ul>
                                                        <li>
                                                          <a href="/privacy">Privacy Policy</a>
                                                          </li>
                                                            <li>
                                                              <a href="/terms">Terms of Service</a>
                                                              </li>
                                                              </ul>
                                                              </footer>
                                                              </body>
                                                              </html>

Note: This HTML beautifier reformats markup structure including proper nesting, attribute spacing, and tag alignment. It handles all HTML elements, void elements (br, img, input), self-closing tags, conditional comments, and inline CSS/JS. For complex minified HTML with deeply nested structures, the beautifier intelligently tracks opening and closing tags to produce clean output.

Why Use Our HTML Beautifier?

Instant HTML Formatting

Beautify messy or minified HTML into clean, readable markup with proper indentation and consistent spacing. Our HTML beautifier processes your code instantly in your browser - no server round trips needed.

Secure & Private Processing

Your HTML code never leaves your device. All beautification happens locally in your browser for complete privacy, making it safe for sensitive markup, proprietary templates, and confidential web projects.

Customizable Formatting Options

Choose your preferred indentation style with configurable space counts or tab indentation. Toggle comment preservation and attribute wrapping to match your project coding standards and team conventions.

100% Free Forever

Our HTML beautifier is completely free with no hidden costs, no signup required, and no usage limits. Format as much HTML as you need, as often as you need - there are no restrictions.

Common Use Cases for HTML Beautifier

Minified HTML Recovery

Restore minified or compressed HTML output from build tools and minifiers back to readable, editable format. Perfect for debugging production HTML or understanding generated markup from frameworks and static site generators.

Team Code Review & Collaboration

Ensure consistent HTML formatting across your development team by beautifying all markup to the same indentation and spacing standards. Reduces review friction and makes code diffs cleaner and more meaningful.

Open Source Contribution Prep

Format HTML contributions to meet project style guidelines before submitting pull requests. Our HTML beautifier helps you match the exact indentation and formatting conventions used by the project maintainers.

Debugging & Troubleshooting

Beautify HTML output to identify nesting errors, missing closing tags, or structural issues. Properly formatted HTML makes it easier to spot mismatched elements, incorrect hierarchies, and rendering problems.

Learning & Documentation

Format HTML examples for documentation, tutorials, and educational content. Clean, consistently indented HTML markup is essential for teaching proper HTML structure and best practices to learners.

Email Template Formatting

Beautify HTML email templates that often come minified or poorly formatted from drag-and-drop builders. Clean, readable email HTML is easier to audit, debug rendering issues, and optimize for different clients.

Understanding HTML Beautification

What is HTML Beautification?

HTML beautification is the process of reformatting raw, minified, or poorly indented HTML markup into clean, readable, and properly structured code. An HTML beautifier analyzes the structure of your HTML - including opening and closing tags, nested elements, attributes, text content, and comments - and applies consistent formatting rules to make the code easier to read, edit, and maintain.

Unlike minification which compresses HTML for smaller file sizes, beautification expands the markup with whitespace and indentation to optimize for human readability. The functional output is identical - only the formatting changes, not the structure or behavior of the HTML.

How Our HTML Beautifier Works

Parse and Normalize: Your HTML input is parsed to normalize line endings, preserve DOCTYPE declarations, and identify the document structure including all opening and closing tags, void elements, and self-closing tags.
Apply Indentation: Each HTML element receives proper indentation based on its nesting depth. The tool tracks the opening and closing tag hierarchy to determine the correct indentation level for every line, handling void elements (br, img, input, meta, link) that do not require closing tags.
Format and Output: The beautified HTML is assembled with consistent spacing between attributes, appropriate line breaks, and configurable indentation. Comments can be preserved or stripped based on your preference, and the final output is presented as clean, readable markup.

What Gets Formatted During Beautification

Tag Indentation: Every nested HTML element receives appropriate indentation based on its depth in the document tree, making the parent-child relationship visually clear and easy to navigate.
Attribute Spacing: Attributes within tags are given consistent spacing - one space between each attribute - and can optionally be wrapped to multiple lines for very long attribute sets.
Line Breaks: Elements that were on the same line are separated onto their own lines with proper nesting, converting compact markup into a vertically structured, readable format.
Comment Handling: HTML comments are preserved or stripped based on your preference. When preserved, they maintain their original placement and content within the beautified document structure.

Privacy, Security & Availability

Your HTML code is processed entirely in your browser using JavaScript - no data is ever transmitted to any server. This means proprietary templates, confidential email markup, and sensitive web content never leave your device. Our HTML beautifier is 100% free with no signup required, no usage limits, no file size restrictions, and no hidden charges. Use it as often as you need, on any size HTML document, for any purpose.

Frequently Asked Questions About HTML Beautifier

An HTML beautifier is a tool that reformats HTML markup with proper indentation, consistent spacing, and clean line breaks to improve readability without changing the functionality of the code. Our HTML beautifier online tool processes everything in your browser for maximum speed and privacy, handling all HTML elements, void elements, inline CSS, and inline JavaScript.

No. Our HTML beautifier only changes the formatting and whitespace of your markup - it never modifies tag names, attributes, attribute values, text content, or any functional aspect of the HTML. The beautified output renders identically to the original input in all browsers.

Absolutely! Your HTML code is completely secure with our HTML beautifier. All formatting happens directly in your browser using JavaScript - no data is ever sent to any server. Your proprietary templates, confidential email markup, and sensitive web content never leave your device.

Yes. Our HTML beautifier correctly identifies all void elements (area, base, br, col, embed, hr, img, input, link, meta, param, source, track, wbr) and self-closing tags. These elements are properly indented without requiring closing tags, and the tool maintains correct nesting depth throughout the document.

Yes! Our HTML beautifier is designed specifically for reformatting minified HTML files. It analyzes the tag structure and applies appropriate indentation and line breaks to convert even single-line minified markup into clean, readable, properly nested HTML.

Yes, our HTML beautifier offers multiple formatting options. You can choose between spaces (2, 4, or 8 spaces) and tab indentation, toggle whether HTML comments are preserved in the output, and optionally wrap long attributes across multiple lines for improved readability.

Yes, our HTML beautifier is 100% free with no hidden costs or limitations. No signup required, no premium tier, no usage limits, no file size restrictions, and no advertisements. Use it as often as you need for any HTML formatting task.

Yes. Our HTML beautifier preserves all inline CSS (within style attributes and style tags) and inline JavaScript (within script tags and event handler attributes like onclick, onload). The content within these blocks is kept intact while the surrounding HTML structure receives proper formatting.