Format and beautify messy HTML code instantly — fix indentation and structure.
HTML Beautifier is a free online tool that formats and indents messy or minified HTML code into a clean, readable structure. Whether you're working with compressed production code, auto-generated markup from a CMS, or just inherited a codebase with zero formatting — this tool fixes it in one click. Powered by the js-beautify library, it supports configurable indent sizes (2 spaces, 4 spaces, or tabs), adjustable line wrap lengths, and smart tag handling. It preserves your code logic while restructuring the visual layout for readability. Inner HTML elements, nested tags, and inline styles are all handled correctly. Everything runs entirely in your browser. Your HTML code is never sent to any server, never stored, and never logged. This makes it safe to use with proprietary code, client projects, or sensitive markup. There are no file size limits, no usage caps, and no account required. Common use cases include cleaning up WordPress theme files, formatting email templates, preparing code for documentation or code reviews, and making auto-generated HTML from tools like Webpack or Gulp human-readable again. Developers, designers, and content creators all benefit from having properly indented HTML. The tool also shows useful statistics after formatting — input size, output size, line count, and processing time. You can download the beautified result as an .html file or copy it directly to your clipboard. For the reverse operation, check out the HTML Minifier tool which compresses HTML by removing whitespace and comments.