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Free Code Beautifier - Format & Prettify Code Online
Beautify and format code for multiple languages. Transform minified or messy code into clean, readable format instantly.
100% Free
Privacy Focused
Instant Results
Works Everywhere
Code Beautifier
Beautify and format code for multiple languages. Transform minified or messy code into clean, readable format instantly.
Input Code
Beautified Output
About This Tool
What is Code Beautifier?
Code formatting makes unreadable, minified, or inconsistently indented code clean again without touching any logic. This Code Beautifier reformats JavaScript, TypeScript, HTML, CSS, SCSS, JSON, SQL, and XML with proper indentation, consistent spacing, and language-appropriate line breaks.
The most common use case is reading minified third-party code. Downloaded npm packages, vendor scripts, and production builds are shipped as single-line files. Running them through the beautifier restores structure so you can read function definitions, trace execution paths, and understand what a library actually does before using it.
Indentation options (2 spaces, 4 spaces, or tabs) let you match the convention of the codebase you are working in. The formatter follows language-specific rules: JavaScript receives consistent brace positioning, HTML gets properly nested tag structure, SQL gets uppercase keywords and line breaks between clauses, and JSON gets standard key-value indentation.
The minify toggle works in the opposite direction - compact well-formatted code into a production-ready single-line version. Both modes accept the same input, so you can switch directions without re-pasting.
Unlike a linter, the beautifier does not flag code quality issues or enforce stylistic opinions. It only adjusts whitespace and indentation, making it safe to run on any code. Useful for formatting code pasted from Stack Overflow, standardizing files before a pull request, and making auto-generated scaffolding code readable.
Features
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.
Simple Process
How It Works
Get started in 4 easy steps
1
Paste Ugly Code
Paste minified or messy code. Tool auto-detects language or select manually.
2
Set Preferences
Choose indentation size, style preferences. Configure formatting options.
3
Beautify Instantly
Tool formats code with proper structure. See before/after comparison.
4
Copy or Download
Copy formatted code to clipboard or download file. Use in your project immediately.
Why Us
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.
Use Cases
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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