Free JavaScript Formatter Online

Format, beautify, and minify JavaScript code instantly. Supports syntax highlighting.

Key Features

💡 Syntax Highlighting

Color-coded JavaScript for better readability and error detection.

⚡ Fast Processing

All operations run locally in your browser for instant results.

🔒 Privacy Protected

Your code never leaves your browser. No server storage.

How to Use JavaScript Formatter

1

Paste Your JavaScript Code

Enter or paste your unformatted JavaScript code into the input area.

2

Choose an Action

Select "Beautify" to format, or "Minify" to compress.

3

Get Formatted Result

View the formatted JavaScript in the output area and copy or download as needed.

Frequently Asked Questions

Basics

What is JavaScript formatting?

JavaScript formatting is the process of organizing JS code with proper indentation, spacing, and line breaks to improve readability and maintainability.

Why should I format my JavaScript?

Formatted JavaScript is easier to read, debug, and maintain. It helps identify bugs, improves code reviews, and makes collaboration more efficient.

Features

What formatting options are available?

Our tool offers beautification (adding proper indentation and spacing) and minification (removing whitespace for production deployment).

Does this tool support ES6+ syntax?

Yes, the formatter handles modern JavaScript including arrow functions, template literals, destructuring, spread operators, classes, and async/await.

Examples

Example: Format a function

Input (Minified):

function greet(name){return`Hello, ${name}!`}

Output (Formatted):

function greet(name) {
  return `Hello, ${name}!`;
}

Example: Array methods

Input:

const numbers=[1,2,3,4,5];const doubled=numbers.map(n=>n*2).filter(n=>n>4);

Formatted Output:

const numbers = [1, 2, 3, 4, 5];
const doubled = numbers
  .map(n => n * 2)
  .filter(n => n > 4);

Troubleshooting

Why is my JavaScript not formatting correctly?

Ensure your JavaScript has valid syntax: matching braces, parentheses, and brackets; properly quoted strings; and balanced template literals.

Does this tool validate JavaScript?

This tool focuses on formatting. For syntax validation and linting, consider using ESLint or similar tools alongside our formatter.