HTML Beautifier
Beautify and format HTML with proper indentation. Fix messy HTML into readable, well-structured code. Free online tool.
What is HTML Beautifier?
An HTML beautifier reformats messy or minified HTML with proper indentation and line breaks, making the document structure clear and readable. HTML often becomes unreadable after minification, automated generation, copy-pasting from CMSs, or when multiple developers work without consistent formatting. This tool structures the HTML hierarchically — child elements are indented within their parents — making it easy to understand nesting, find unclosed tags, and navigate the document structure.
How It Works
The tool parses your HTML into a DOM-like tree structure, then serializes it back with consistent formatting rules: each block-level element starts on a new line, child elements are indented one level deeper than their parent, attributes are formatted consistently, and self-closing tags are handled according to HTML5 rules. Inline elements within text flow are kept on the same line. The tool handles malformed HTML gracefully, preserving content even when markup is imperfect.
Common Use Cases
- •Cleaning up minified HTML source code for debugging and inspection
- •Formatting HTML generated by WYSIWYG editors or content management systems
- •Making HTML email templates readable for editing and maintenance
- •Reformatting HTML snippets from Stack Overflow or documentation for integration
- •Cleaning up auto-generated HTML from build tools, templating engines, or scrapers
- •Standardizing HTML formatting across a team before committing to version control
Frequently Asked Questions
How does it handle self-closing tags?▼
Self-closing tags like <br/>, <img/> are kept on one line without adding indentation for children.
Does beautifying HTML change how the page renders?▼
Almost never, but not quite never. Whitespace is significant between inline elements, so adding newlines around `<span>` or `<a>` tags can introduce a visible space. It is also significant inside `<pre>` and `<textarea>`, whose contents must be left exactly as they are.
What indent size should I use?▼
Two spaces is the most common convention for HTML and keeps deeply nested markup from running off the screen. Four spaces suits shallower documents. Tabs are preferable for accessibility, since a reader can set their own display width.
Can it fix invalid or broken HTML?▼
It formats rather than repairs. Unclosed tags and mismatched nesting will often show up clearly once the indentation is consistent, which makes the problem easy to spot, but you still need to correct the markup yourself. Use a validator for a definitive list of errors.
Why are my void elements formatted differently?▼
Elements such as `<br>`, `<img>`, `<input>`, `<meta>` and `<link>` have no closing tag. HTML5 does not require a trailing slash, whereas XHTML does — hence the difference between `<br>` and `<br />`. Either parses in browsers; pick one and be consistent.
Should I beautify HTML before deploying to production?▼
No, do the opposite. Beautified markup is for reading and debugging; production should be minified to reduce bytes. Keep the readable version in source control and minify during your build.
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