HTML Formatter

Format and beautify HTML code with proper indentation and structure

HTML Formatter & Beautifier — Clean Up, Indent, and Validate HTML Code with Configurable Indentation and One-Click Minification for Production

  1. Paste your HTML markup into the input area — the tool handles everything from simple snippets to complete page documents with <!DOCTYPE>, <head>, and <body> sections. HTML (HyperText Markup Language) is the foundational language of the web, and cleanly formatted HTML is essential for maintainability, accessibility auditing, SEO optimization, and collaborative development. When HTML becomes messy — common after WYSIWYG editor output, CMS template rendering, or email template generation — deeply nested elements, missing indentation, and inconsistent formatting make the document difficult to debug and maintain.
  2. Click Format to beautify your HTML with proper hierarchical indentation. The tool uses the browser's built-in DOMParser to parse your HTML into a standards-compliant DOM tree, then serializes it back with clean, consistent formatting. Each nested element is indented one level deeper, attributes are clearly separated on each opening tag, and the document structure becomes immediately visible. Use the Indent selector to choose between 2-space, 4-space, or tab indentation to match your project's style guide. The formatter handles: void elements (<br>, <img>, <input>) without adding spurious closing tags, inline elements (preserving their inline nature), <pre> and <code> blocks (preserving internal whitespace), HTML entities (©,  ), and SVG/MathML embedded within HTML5 documents.
  3. Toggle to Minify to compress your HTML to production-ready form by removing all non-functional whitespace between tags — this reduces file size (typically 10–30% depending on indentation depth) without affecting how the browser renders the page. The tool displays helpful statistics including line counts for both formatted and minified versions. If the HTML contains structural errors (unclosed tags, improper nesting), the parser attempts to recover gracefully (as browsers do) and produces the best possible formatted output. Copy the result for immediate use in your codebase. All formatting happens locally — your HTML, which may contain proprietary page structure or business logic in comments, never leaves your device.

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