JavaScript Beautifier & Formatter

About this tool

Beautify and format JavaScript code with our free online JavaScript beautifier tool. Transform minified, compressed, or poorly formatted JS into clean, readable, properly indented code. Perfect for debugging minified JavaScript files, understanding third-party libraries, cleaning up messy code, preparing JS for editing, code review readability, learning from minified frameworks, reverse-engineering scripts, or maintaining consistent JavaScript formatting across projects.

Our JavaScript beautifier intelligently formats your code with proper indentation, adds line breaks after statements and function declarations, spaces operators and parameters appropriately, organizes nested code blocks, handles ES6+ syntax (arrow functions, template literals, destructuring, async/await), and maintains proper JavaScript syntax. Customizable formatting options let you control indentation style, brace placement, spacing preferences, and more to match your coding standards.

Essential for web developers debugging minified production JavaScript, frontend engineers customizing third-party libraries, students learning from compressed framework code, security researchers analyzing obfuscated scripts, code reviewers needing readable code, teams maintaining coding standards, and anyone needing to make JavaScript code more readable and maintainable. The tool handles vanilla JavaScript, jQuery, React, Vue, Angular, Node.js code, and all modern JavaScript features.

All formatting happens instantly and securely in your browser - your JavaScript code stays completely private with no server uploads. No registration required, no file size limits, works on mobile devices, and functions offline. Free to use unlimited times for all your JavaScript formatting needs.

Usage examples

Output:
function add(a, b) {
  return a + b;
}

const multiply = (x, y) => x * y;

console.log(add(2, 3));

(Properly indented with readable structure)

Output:
const users = [
  { name: 'John', age: 30 },
  { name: 'Jane', age: 25 }
];

const names = users.map(u => u.name);

(Arrays and objects formatted)

Output:
async function fetchData() {
  const response = await fetch('/api/data');
  const data = await response.json();
  return data;
}

(Async code properly structured)

Output:
function outer() {
  let x = 10;
  
  function inner() {
    return x * 2;
  }
  
  return inner();
}

(Nested functions with proper indentation)

Output:
if (x > 10) {
  console.log('big');
} else if (x > 5) {
  console.log('medium');
} else {
  console.log('small');
}

(If/else properly formatted)

How to use

1. Paste your JavaScript code (minified, compressed, or unformatted) into the text area
2. Choose indentation style: 2 spaces, 4 spaces, or tabs
3. Select brace style: same line, new line, or end-expand
4. Optionally preserve empty lines or add spaces around operators
5. Click "Run Tool" to beautify and format your JavaScript
6. Copy the clean, formatted JS code with one click

Benefits

• Instant JavaScript beautification and formatting
• Unminify compressed JS files
• Customizable indentation: 2 spaces, 4 spaces, or tabs
• Multiple brace style options (same line, new line, end-expand)
• Handles ES6+ syntax (arrow functions, async/await, destructuring)
• Formats nested functions and code blocks correctly
• Proper spacing around operators and parameters
• Preserves comments and string literals
• No file size limits - format large JavaScript files
• Great for learning from minified libraries
• Improves code readability dramatically
• One-click copy functionality
• No registration required
• Complete privacy - browser-based
• Free forever with unlimited use
• Works offline after first load

FAQs