JavaScript Beautifier & Formatter

What is a JavaScript Beautifier?

A JavaScript beautifier (also known as a JavaScript formatter or code formatter) is a tool that takes minified, compressed, or poorly formatted JavaScript code and transforms it into clean, readable code with consistent indentation, spacing, and style. It uses industry-standard formatting rules from Prettier to ensure your code follows best practices and is easy to read, maintain, and debug. This tool supports JavaScript, TypeScript, JSX, and modern ES6+ syntax including arrow functions, async/await, destructuring, and template literals.

How to Use This Tool

1. Paste your JavaScript, TypeScript, or JSX code into the input area on the left
2. Configure your formatting preferences using the options panel (indentation, quotes, semicolons, etc.)
3. Click "Format Code" to beautify your code with proper indentation and consistent styling
4. Review the formatted output with syntax highlighting in the right panel
5. Use the "Copy Output" button to copy the formatted code to your clipboard
6. Click "Load Sample" to see an example of ES6+ JavaScript code formatting
7. If there are any syntax errors, they will be displayed with helpful error messages

Common Use Cases

• Beautifying Minified Code: Make compressed production JavaScript readable for debugging and code reviews
• Code Standardization: Enforce consistent code style across your team or project
• Learning and Education: Study well-formatted code examples to understand best practices
• Code Migration: Clean up legacy code or reformat code from different sources
• Pre-commit Formatting: Format code before committing to version control
• Debugging Obfuscated Code: Make hard-to-read code more understandable
• Documentation: Create clean code snippets for technical documentation

Features

• Prettier Integration: Uses Prettier, the industry-standard code formatter trusted by millions of developers
• Multi-language Support: Format JavaScript, TypeScript, JSX, and modern ES6+ syntax
• Customizable Options: Configure indentation (2 spaces, 4 spaces, tabs), quote style, semicolons, and trailing commas
• Syntax Highlighting: Color-coded output for better code readability
• Real-time Error Detection: Instantly identify syntax errors with descriptive messages
• One-click Copy: Copy formatted code to clipboard with a single click
• Statistics Display: View character count, line count, and file size
• Client-side Processing: All formatting happens in your browser - your code stays private and secure
• ES6+ Support: Full support for arrow functions, async/await, destructuring, classes, and more

Frequently Asked Questions

Is this JavaScript beautifier free?

Yes! This JavaScript beautifier is completely free to use with no registration, no limits, and no hidden fees. You can format as much code as you want.

Is my code secure and private?

Absolutely. All code formatting happens entirely in your browser using JavaScript and WebAssembly. Your code never leaves your computer and is never sent to any server. This makes it completely safe to use with proprietary code, personal projects, or sensitive business logic.

What types of JavaScript does this support?

This tool supports all modern JavaScript variants including: ES5, ES6/ES2015, ES2016+, TypeScript, JSX (React), and modern syntax like arrow functions, async/await, destructuring, optional chaining, nullish coalescing, and more. It automatically detects the syntax and applies appropriate formatting.

What formatting options are available?

You can customize: Indentation (2 spaces, 4 spaces, or tabs), Quote style (single or double quotes), Semicolons (add or omit), and Trailing commas (ES5, all, or none). These options follow Prettier's configuration standards used by millions of developers worldwide.

Can I format minified or obfuscated code?

Yes! This tool excels at beautifying minified JavaScript code from production bundles. However, note that obfuscated code with renamed variables will still have those short variable names - the beautifier only fixes formatting and structure, not variable naming.

Does this work with React/JSX code?

Yes! The tool fully supports JSX syntax used in React applications. It will properly format JSX elements, props, embedded JavaScript expressions, and all React-specific patterns.

What's the difference between this and Prettier?

This tool uses Prettier under the hood, so you get the same high-quality formatting. The difference is this is a simple web interface that doesn't require installing Node.js, npm, or any dependencies. It's perfect for quick formatting tasks, learning, or when you don't have access to your development environment.

Can I use this for large JavaScript files?

Yes! Since processing happens in your browser, there's no server-side file size limit. Files up to several megabytes can be formatted, though very large files may take a moment to process depending on your computer's performance.

Are there keyboard shortcuts available?

Yes! Use Tab to navigate between buttons and text areas, Enter to activate focused buttons, and Escape while focused on text areas to quickly clear content.