Structured Hierarchy for Nested Tags
Properly align deep DOM structures, tables, SVG vectors, and custom web components with customizable indentation levels.
HTML Formatter & Beautifier
Free online HTML Formatter and Beautifier. Indent messy HTML/XML markup, strip unwanted comments, minify web code, and view live rendering in your browser.
Indent:
Input HTML1 line · 1.5 KB
Formatted Result
58 lines · 2.0 KB+29% formatted
Input: 1.5 KB (1 line)•Output: 2.0 KB (58 lines)(+29% formatted)•Elements: 36 tags
HTML5
Developer Scenario: Cleaning Up Compressed Email Newsletter Templates
A web designer needs to inspect and customize a single-line minified HTML marketing email containing nested table structures.
| Minified Snippet | <div><!--header--><table><tr><td><h1>Special Offer</h1><p>Save 20%</p></td></tr></table></div> |
| Beautified Output | <div> <!--header--> <table> <tr> <td> <h1>Special Offer</h1> <p>Save 20%</p> </td> </tr> </table> </div> |
| Saved Space on Minify | Minifying original markup strips comments and whitespace, reducing payload size by 35%. |
💡 The beautifier restores visual hierarchy to complex nested structures, making edits fast and error-free.
How to use HTML Formatter & Beautifier
- 1
Paste your unformatted, minified, or disorganized HTML markup into the code editor, or click "Load Sample HTML".
- 2
Select your desired indentation (2 spaces, 4 spaces, or tab), or switch to "Minify" to strip comments and collapse whitespace for production delivery.
- 3
Switch to the "Live Preview" tab to inspect how the formatted markup renders visually in a secure sandboxed frame, then copy or download the result.
Why use this tool?
Production-Ready HTML Minification
Remove redundant whitespace, newline characters, and HTML comments to achieve smaller payload transfers and faster page speed.
Instant Sandboxed Live Preview
Verify visual appearance side-by-side with your code without needing to leave your browser or spin up a local development server.
Continue your workflow
Working with script tags or JSON-LD schema inside HTML? Use the Format and validate JSON payloads.
Need to inspect configuration or state diffs? Try the Compare JSON files side-by-side.
Comparing template changes line-by-line? Use the Compare text and HTML template diffs.
Encoding href links or image data URIs in HTML? Check out the Encode URL and query strings.
HTML Void Elements (Self-Closing Tags)
Standard HTML5 void elements that do not require closing tags in valid markup.
| Tag Name | Purpose | Standard HTML5 Syntax | XHTML / XML Syntax |
|---|---|---|---|
| <img> | Image embed | <img src="..." alt="..."> | <img src="..." alt="..." /> |
| <input> | Form input control | <input type="text"> | <input type="text" /> |
| <br> | Line break | <br> | <br /> |
| <hr> | Horizontal rule | <hr> | <hr /> |
| <meta> | Document metadata | <meta charset="UTF-8"> | <meta charset="UTF-8" /> |
| <link> | External resource link | <link rel="stylesheet"> | <link rel="stylesheet" /> |
Both HTML5 unclosed void tags and XML self-closing tags are supported seamlessly.
Frequently asked questions
Does this formatter alter script or style tags inside HTML?
Inline CSS and JavaScript are preserved cleanly with proper indentation inside their respective <style> and <script> container tags.
Can I format SVG or XML files with this tool?
Yes. SVG vector graphics and XML schemas follow standard tag-based markup rules and format beautifully with this tool.
Is the Live Preview secure?
Yes. The live preview renders inside an isolated, sandboxed iframe container to prevent any malicious scripts from affecting your session.
Does minification remove HTML comments?
Yes, when minifying code, standard comments (<!-- ... -->) are safely stripped, while conditional comments (like IE directives) can be preserved.
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