HTML Formatter & Beautifier
Format HTML documents into clean, structured code without breaking inline text or pre blocks.
- Runs in your browser
- Free, no signup
HTML formatting runs locally inside your browser — markup is never sent to external servers.
HTML generated by CMS engines, server-side frameworks, and compilers is often packed into unreadable blocks. ToolDuck HTML Formatter reconstructs clear tag nesting, indents child elements, and highlights structural hierarchies.
Void elements like img, br, input, and meta are handled correctly according to HTML5 standards, while whitespace inside pre and textarea elements remains untouched.
How to use this tool
- Paste your HTML markup into the editor or click "Load Sample" to test an example document.
- Select your indentation spacing (2 spaces, 4 spaces, or Tab).
- Click "Format / Beautify" to indent tags, or "Minify" to strip comments and collapse whitespace.
- Copy the formatted HTML to your clipboard or download a ready-to-use .html file.
Accurate HTML5 Hierarchy and Void Elements
Unlike XML, HTML5 does not require self-closing slashes on void tags such as <br>, <hr>, <img>, and <meta>. This formatter recognizes HTML5 void elements and prevents invalid indentation nesting.
Preformatted text blocks (<pre>, <textarea>, <code>) preserve their internal whitespace exactly as authored.
Frequently asked questions
Will formatting break text inside pre tags?
No. Content inside pre, code, and textarea elements is protected so formatting never alters meaningful whitespace.
Can I minify HTML for production?
Yes. Click Minify to collapse unnecessary whitespace and strip HTML comments without altering rendered content.