What is JavaScript Beautification?
JavaScript beautification is the process of reformatting JS code to improve readability and maintainability. It adds proper indentation, line breaks between statements, and consistent spacing throughout your code. This is the opposite of minification, which removes all unnecessary whitespace to reduce file size. Our beautifier uses Prettier, the industry-standard formatter trusted by millions of developers.
Why Use Our JavaScript Beautifier?
- Powered by Prettier: Industry-standard formatting used by professional developers
- Modern Syntax Support: ES6+, JSX, Flow, and TypeScript all supported
- Consistent Style: 2-space indentation, semicolons, double quotes
- Unminify JS: Expand compressed production code for debugging
- 100% Private: All processing happens in your browser - no data sent to servers
Formatting Settings
- Indentation: 2 spaces per level (Prettier default)
- Semicolons: Automatically added at end of statements
- Quotes: Double quotes for string literals
- Parser: Babel parser for ES6+, JSX, TypeScript support
When to Beautify JavaScript
Debugging Minified Code: When you need to understand minified JS from production or CDNs, beautifying makes the code readable and debuggable.
Code Reviews: Well-formatted JavaScript is easier to review and spot issues during pull requests.
Learning from Libraries: Beautify source code from frameworks to understand their implementation.
Standardizing Code: Ensure consistent formatting across your team by running JS through a beautifier.
Legacy Code: Make old or poorly formatted JavaScript easier to work with and understand.
Supported JavaScript Features
- ES6+ Syntax: Arrow functions, destructuring, template literals, modules
- JSX: React component syntax with proper formatting
- TypeScript: Type annotations, interfaces, generics
- Flow: Flow type annotations and syntax
- Modern Features: Optional chaining, nullish coalescing, async/await
Frequently Asked Questions
What's the difference between beautifying and minifying JavaScript?
Beautifying adds whitespace for readability, while minifying removes it for smaller file sizes. Use beautified JS during development and minified JS in production.
Will beautifying change how my JavaScript works?
No, beautifying only changes whitespace and formatting. Your JavaScript will execute exactly the same way. Variable names, logic, and functionality remain unchanged.
Can I beautify obfuscated JavaScript?
Beautifying adds whitespace but doesn't rename variables. Obfuscated code with mangled variable names will be formatted but still difficult to understand.
Why is Prettier showing a syntax error?
Prettier requires valid JavaScript syntax. Check for missing brackets, unclosed strings, or invalid syntax. The error message usually indicates where the problem is.