UFOZoo

Code Beautifier — Format HTML, CSS & JavaScript Online

Format and beautify HTML, CSS, and JavaScript code online. Auto-detect language, customizable indentation, and instant preview. Works entirely in your browser.

Features

  • ✓Format and beautify HTML, CSS, and JavaScript in one unified tool — no need to switch between sites
  • ✓Automatic language detection — paste any code and the tool identifies HTML, CSS, or JS instantly
  • ✓Configurable indentation — choose between 2 spaces, 4 spaces, or tab characters for output formatting
  • ✓Preserve or remove comments — keep documentation comments for readability or strip them for clean output
  • ✓Sort CSS properties alphabetically — optional property ordering for consistent, organized CSS files
  • ✓Format HTML attributes — align attributes on separate lines or keep them inline for compact output
  • ✓Real-time formatting — see beautified output as you type, no button clicks needed
  • ✓Side-by-side comparison — compare original minified code with beautified output
  • ✓One-click copy to clipboard and save as .html, .css, or .js file
  • ✓Syntax-aware formatting — respects string literals, comments, and nested structures
  • ✓Handles large files — browser-native processing with no file size limits
  • ✓100% client-side processing — your code never leaves your browser, safe for proprietary code

How to Use

  1. 1Paste your minified or poorly formatted HTML, CSS, or JavaScript code into the input panel
  2. 2The tool auto-detects the language and starts formatting immediately as you type
  3. 3Select indentation style: 2 spaces for compact code, 4 spaces for readability, or tabs
  4. 4Toggle 'Remove Comments' to strip comments for a cleaner output, or keep them for reference
  5. 5Toggle 'Sort CSS Properties' when formatting CSS to alphabetically order properties within rules
  6. 6Toggle 'Format HTML Attributes' to place each HTML attribute on its own line for better readability
  7. 7Compare the original and beautified code side-by-side in the split view
  8. 8Click 'Copy' to paste the formatted code into your editor, or 'Save' to download as a file
  9. 9Use the sample buttons to quickly test formatting with example HTML, CSS, and JavaScript code

Frequently Asked Questions

What languages are supported?

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The tool supports HTML (including embedded CSS and JavaScript), CSS (including SCSS and Less syntax), and JavaScript (including ES6+ features, JSX, and TypeScript). Each language uses its own formatting rules for optimal results.

How does auto-detection work?

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The tool analyzes the code structure — looking for HTML tags, CSS selectors/properties, or JavaScript syntax patterns. It identifies the most likely language and formats accordingly. If detection is wrong, you can manually select the language.

What's the difference between 2 spaces and 4 spaces?

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2 spaces produces more compact code, popular in modern JavaScript projects and frameworks like React. 4 spaces is traditional for HTML and CSS, providing more visual nesting clarity. Choose based on your project's style guide.

Will formatting change my code's functionality?

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No. The formatter only adds, removes, or repositions whitespace and line breaks. It does not change variable names, logic, or any functional code. The beautified code produces exactly the same output as the original.

Does it handle minified code?

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Yes. The tool excels at formatting minified code — single-line HTML, compressed CSS, or bundled JavaScript. It restores proper indentation and line breaks, making minified code readable again for debugging or learning.

Can I use this for SCSS or TypeScript?

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Yes. CSS mode handles SCSS, Less, and other CSS preprocessors. JavaScript mode handles TypeScript, JSX, and modern ES6+ syntax including arrow functions, template literals, destructuring, and async/await.

Is my code sent to a server?

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No. All formatting happens entirely in your browser using JavaScript. Your source code never leaves your device, is never transmitted over the network, and is never stored anywhere. This makes it safe for proprietary or sensitive code.

Does it work on mobile?

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Yes, but the experience is better on desktop. On mobile, the input/output panels stack vertically. You can still paste code, adjust formatting options, and copy or save the result. Landscape mode on tablets provides more comfortable editing.

How does comment removal work?

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When enabled, the tool strips HTML comments (<!-- -->), JavaScript comments (// and /* */), and CSS comments (/* */) from the output. This is useful for production code where comments aren't needed. Toggle it off to preserve all comments.

What about CSS property sorting?

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When enabled, CSS properties within each rule are sorted alphabetically. This creates consistent, predictable CSS files and makes it easier to find specific properties. It follows the CSSComb standard ordering.

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