Free Online Tool

Online JavaScript Beautifier

Transform minified or messy JavaScript code into beautifully formatted, readable scripts. Our JavaScript beautifier automatically formats your code with proper indentation, line breaks, and spacing — making it easier to read, maintain, and debug.

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Formatting Options

Paste your JavaScript code here

Characters: 0 | Lines: 0 | Functions: 0

Beautified JavaScript

Characters: 0 | Lines: 0 | Functions: 0
JavaScript beautified successfully

Instant Formatting

Automatically formats your JavaScript code with proper indentation, spacing, and line breaks in real-time.

Customizable Options

Choose indent size, tabs vs spaces, brace style, and more to match your coding standards.

Standards Compliant

Produces clean, readable JavaScript that follows industry best practices and coding standards.

How to Beautify JavaScript

Quick Steps:

  1. 1Paste your minified or messy JavaScript code in the left area
  2. 2Adjust formatting options based on your preferences
  3. 3See the beautified JavaScript instantly on the right side
  4. 4Copy or download the formatted JavaScript

Formatting Options:

  • •
    Indent Size: Choose between 2, 4, or 8 spaces for indentation levels.
  • •
    Brace Style: Collapse (K&R) keeps braces on same line, Expand (Allman) puts them on new lines.
  • •
    Use Tabs: Use tab characters instead of spaces for indentation.
  • •
    Preserve Empty Lines: Keep empty lines for better code organization.

Before & After Example

Before Minified JavaScript

function calculate(a,b){const result=a+b;return result;}const multiply=(x,y)=>x*y;

After Beautified JavaScript

function calculate(a, b) { const result = a + b; return result; } const multiply = (x, y) => x * y;

Common Use Cases

🔍 Debugging

Unminify JavaScript to understand and debug production code

📚 Learning

Study minified JavaScript from websites by making it readable

🔧 Development

Format messy JavaScript code from legacy projects

📖 Documentation

Create readable JavaScript examples for tutorials and docs

Why Use a JavaScript Beautifier?

Improved Readability: Minified JavaScript is unreadable. Beautifying makes it easy to understand the code structure and logic quickly.

Easier Debugging: When JavaScript isn't working as expected, formatted code helps you identify issues faster by showing the structure clearly.

Code Maintenance: Well-formatted JavaScript is easier to maintain, update, and refactor. It helps teams work together more effectively.

Learning Tool: Study how other websites implement features by beautifying their minified JavaScript files.

Standardization: Ensure consistent formatting across your codebase by beautifying all JavaScript files with the same settings.

Pro Tips

1

Use Load Example

Click "Load Example" to see how the tool works with sample JavaScript

2

Match Your Style

Configure options to match your team's coding standards

3

Download for Later

Save beautified JavaScript as a .js file for your projects

4

Real-time Preview

See changes instantly as you adjust formatting options