Code Beautifier
Beautify CSS, JS, and HTML
This free online code beautifier runs in your browser and is part of our Developer Tools collection.
Code Beautifier
Format and beautify CSS, JavaScript, and HTML code with proper indentation.
Features:
- Automatic code formatting with proper indentation
- Supports CSS, JavaScript, HTML, and JSON
- Customizable indentation (2 spaces, 4 spaces, or tabs)
- Makes minified code readable again
- Consistent code style across your project
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Instant In-Browser Execution
Runs locally in JavaScript without wait times or server delays.
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100% Privacy & Security
Your inputs and files are never stored or logged on remote servers.
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Cross-Device Responsive
Fully optimized for mobile smartphones, tablets, and desktop displays.
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100% Free Forever
No subscription fees, no signups, and no software installations.
How to Use the Online Code Beautifier
1
Choose Code Syntax
Select HTML, CSS, JavaScript, JSON, or XML formatting mode.
2
Paste Minified or Unformatted Code
Paste raw or compressed code into the input panel.
3
Select Indentation Style
Choose 2 Spaces (modern web standard), 4 Spaces, or Tab indentation.
4
Beautify & Format Code
Click "Beautify Code" to reconstruct indentation hierarchy, format brackets, and copy the clean code.
Frequently Asked Questions
Common questions about using this free online code beautifier.
Can this tool format minified production bundles? ▾
Yes! It un-minifies dense one-line JavaScript and CSS bundles, restoring proper line breaks, bracket indentation, and statement spacing for debugging.
Does beautifying alter code logic? ▾
Never. Beautification affects only cosmetic whitespace and indentation formatting; it never alters execution order, variable names, or logic.
Can I format XML and SVG files? ▾
Yes. Select the XML mode to format nested XML tags, configuration manifests, and SVG vector markup with consistent tree indentation.
Does this beautifier support modern ES6+ JavaScript syntax? ▾
Yes. It supports arrow functions, async/await, optional chaining (`?.`), destructuring, and template literals.
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