HTML Beautifier

How to Use

1. Paste your HTML into the input panel.
2. Click Beautify to format with indentation, or Minify to compress.
3. Choose your indent size (2 or 4 spaces).
4. Click Copy to copy the result.

Features

• Automatic indentation with configurable spacing
• Proper handling of void elements (br, img, input, etc.)
• HTML comment preservation during beautification
• Minification removes comments and excess whitespace
• 100% client-side — no data transmitted

Why Format HTML?

Well-formatted HTML is easier to read, debug, and maintain. When HTML is minified or poorly indented — as often happens with CMS output, email templates, or code generated by visual editors — the nesting structure becomes impossible to follow. Proper indentation reveals the parent-child relationships between elements at a glance, making it easy to spot unclosed tags, misplaced elements, and structural problems.

Formatting is especially valuable when reviewing HTML generated by third-party tools, inspecting browser DevTools output, or inheriting code from other developers. A consistently formatted codebase reduces cognitive load and speeds up code reviews.

When to Minify HTML

Minification removes all unnecessary whitespace, line breaks, and comments from HTML to reduce file size. For a typical web page, minification can reduce HTML size by 10–30%. While this savings is modest compared to image or JavaScript optimization, it contributes to faster Time to First Byte (TTFB) and reduces bandwidth costs at scale.

Minify HTML for production deployments, email templates (where some email clients are sensitive to whitespace), and any context where file size directly impacts performance. Keep formatted HTML in your source code repository for readability — let your build pipeline handle minification.

HTML Formatting Best Practices

• Consistent indentation — Choose 2 or 4 spaces and stick with it across your entire project. Configure your editor's .editorconfig to enforce this.
• One attribute per line for complex elements — When an element has many attributes, placing each on its own line improves readability.
• Close all tags — While HTML5 allows some optional closing tags (like </li> and </p>), always closing them prevents ambiguity.
• Use semantic elements — Replace generic <div> wrappers with semantic tags like <nav>, <main>, <article>, and <section>.
• Keep nesting depth reasonable — If your HTML is nested more than 6–8 levels deep, consider refactoring with CSS Grid/Flexbox to flatten the structure.

Void Elements

HTML defines certain elements as "void" — they cannot have any content and do not require a closing tag. These include <br>, <hr>, <img>, <input>, <link>, <meta>, <area>, <col>, <embed>, <source>, <track>, and <wbr>. This beautifier correctly handles void elements by not adding closing tags or indenting child content.

Related Tools

Format other web languages with the JSON Formatter, CSS Minifier, or JS Minifier. Encode HTML special characters with the HTML Entity Encoder or URL Encoder. Test patterns with the Regex Tester. Compare HTML versions with the Diff Checker.