Free Code Beautifier - Format & Prettify Code Online
Beautify and format code for multiple languages. Transform minified or messy code into clean, readable format instantly.
What is Code Beautifier?
Our Code Beautifier transforms messy, minified, or poorly formatted code into clean, readable code with proper indentation and structure. Supporting multiple programming languages including JavaScript, Python, HTML, CSS, JSON, XML, and more, it's the perfect tool for making code maintainable and understandable.
Whether you're debugging minified third-party libraries, cleaning up code before review, or making automatically generated code readable, our beautifier applies language-specific formatting rules intelligently. It adds proper indentation, line breaks, spacing, and organizes code structure while preserving functionality.
The tool is highly customizable - choose indentation size (2 or 4 spaces, tabs), configure line length limits, control brace styles, and set formatting preferences per language. See before/after comparison side-by-side, with syntax highlighting for easy reading.
All formatting happens locally in your browser using advanced AST (Abstract Syntax Tree) parsers. Your code never leaves your device, making it safe for proprietary code. Perfect for developers, code reviewers, and anyone working with ugly code that needs cleaning.
Powerful Features
Everything you need in one amazing tool
Multi-Language Support
JavaScript, Python, HTML, CSS, JSON, XML, SQL, and more. Auto-detects language.
Smart Formatting
Applies language-specific rules. Proper indentation, spacing, and structure.
Customizable Options
Choose indentation (2/4 spaces, tabs), line length, brace style, and more.
Before/After Compare
View original and formatted code side-by-side. See improvements instantly.
Syntax Highlighting
Color-coded syntax for easy reading. Makes code structure clear and obvious.
100% Private
Client-side processing only. Your code stays on your device. Completely secure.
How It Works
Get started in 4 easy steps
Paste Ugly Code
Paste minified or messy code. Tool auto-detects language or select manually.
Set Preferences
Choose indentation size, style preferences. Configure formatting options.
Beautify Instantly
Tool formats code with proper structure. See before/after comparison.
Copy or Download
Copy formatted code to clipboard or download file. Use in your project immediately.
Why Choose Our Code Beautifier?
Stand out from the competition
All Languages
Support for 20+ programming languages. One tool for all your formatting needs.
Intelligent Formatting
Understands code structure. Applies language-specific best practices automatically.
Instant Results
Format even large files in milliseconds. No waiting or server delays.
Visual Comparison
See improvements side-by-side. Understand formatting changes clearly.
Unlimited Usage
Beautify unlimited files. No restrictions or rate limits ever.
Code Safety
Preserves functionality perfectly. Only changes formatting, not logic.
Perfect For
See how others are using this tool
Debug Minified Libraries
Make third-party minified code readable. Understand external dependencies better.
Code Review
Format messy code before reviewing. Make team reviews easier and faster.
Pre-Commit Cleanup
Clean code before committing. Maintain consistent code style across team.
Clean Generated Code
Format code from code generators. Make auto-generated code maintainable.
Documentation
Format code examples for tutorials. Make learning resources clearer.
Legacy Code
Modernize old code formatting. Bring legacy code up to current standards.
Frequently Asked Questions
Everything you need to know about Code Beautifier
No! Code beautification only changes formatting - whitespace, indentation, and line breaks. It never modifies the actual logic, variable names, or functionality. Your code will work exactly the same, just look prettier and be easier to read. Always test after beautifying, but issues are extremely rare.
JavaScript, TypeScript, JSON, HTML, CSS, SCSS, Python, Java, C/C++, C#, PHP, Ruby, Go, Rust, SQL, XML, and more. The tool auto-detects most languages from syntax, or you can manually select. Each language has specific formatting rules following industry conventions and best practices.
Yes! Choose indentation (2 spaces, 4 spaces, or tabs), configure brace styles (K&R, Allman, etc.), set maximum line length, control blank lines, and more. You can save preferences for consistent formatting or use industry-standard presets like Airbnb, Google, or Standard styles for JavaScript.
Beautification and minification are opposites! Beautification adds whitespace, indentation, and formatting to make code readable. Minification removes all that to make files smaller. Use beautification for development/debugging, minification for production. You can beautify minified code to understand it, then re-minify for deployment.
No, beautifiers only format valid code - they don't fix syntax errors. If your code has errors, the beautifier will either skip formatting or show an error message pointing to the problem. Fix syntax errors first, then beautify. Some tools offer "best effort" formatting that works even with minor errors.
Never! All code beautification happens entirely in your browser using JavaScript parsers and formatters. Your code is processed locally and never uploaded to any server. This makes it completely safe for proprietary code, client projects, or sensitive code that cannot leave your organization or device.
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