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All ToolsHTML Beautifier
HTML Beautifier
Format and beautify HTML code with proper indentation — paste messy HTML and get clean, readable markup instantly.
What is HTML Beautifier?
HTML Beautifier is a free online tool that formats and indents raw or minified HTML code. Paste any messy HTML and instantly get clean, readable, properly indented markup.
How It Works
The tool uses a two-pass tokenizer: first it tokenizes the HTML into typed tokens (doctype, open tags, close tags, void elements, text, comments, raw blocks), then renders them with correct 2-space indentation. Attribute strings containing > are handled safely. Script, style, and pre blocks have their content preserved verbatim.
How to Use
- 1
Paste your HTML
Paste raw, minified, or badly indented HTML into the editor.
- 2
Beautify
Click "Beautify HTML" to add consistent indentation, proper nesting, and line breaks.
- 3
Set indent style
Choose between 2 spaces, 4 spaces, or tabs for indentation.
- 4
Copy or download
Copy the clean HTML or download it as an .html file.
Who Uses This Tool
🖥️
Inspecting Generated Markup
Expand server-rendered or framework-generated HTML to understand the DOM structure your code is producing.
🎨
Template Development
Reformat email or CMS templates that have been collapsed into a single line so they are easier to edit.
📚
Documentation Samples
Clean up HTML code snippets before embedding them in technical documentation or tutorials.
🔄
Legacy Code Cleanup
Reindent hand-written HTML files from older projects to bring them up to modern readability standards.
🧑🏫
Teaching Markup
Format minified example files used in coding courses so students can see clear nesting and indentation.
🛠️
Debugging Nesting Issues
Visualize the tag hierarchy of messy HTML to spot unclosed or incorrectly nested elements quickly.
Why Choose This Tool
Proper Tokenizer
Uses a two-pass tokenizer rather than regex substitution, so angle brackets inside attribute values never confuse the formatter.
Raw Block Preservation
Content inside <script>, <style>, and <pre> tags is preserved verbatim so your code and styles are never corrupted.
Void Element Awareness
Correctly identifies self-closing elements like <br>, <img>, and <input> so they are never given erroneous closing tags.
Inline Block Optimization
Short text-only elements like <h1>Title</h1> are kept on one line for cleaner, more readable output.
Comment Support
HTML comments and DOCTYPE declarations are correctly indented and preserved at the right nesting depth.
No Upload Needed
Everything runs in your browser so large HTML files are processed instantly with complete privacy.
Key Benefits
- Proper tokenizer — handles > inside attribute values safely
- Preserves <script>, <style>, <pre> content verbatim
- Inline short text blocks kept on one line (e.g. <h1>Title</h1>)
- Correctly handles void/self-closing elements
- Handles DOCTYPE, HTML comments, CDATA
- 100% browser-based — no uploads
Frequently Asked Questions
Also Known As
html beautifier online freeformat html code onlinehtml code formatter browserpretty print html onlinebeautify html markup onlinehtml indenter online toolunminify html onlinehtml formatter no install
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