Free Online Tool

JavaScript Beautifier

Format, beautify, and validate your JavaScript code instantly. Clean up messy JS, minify for production, or compress your scripts — all in your browser.

Format & Beautify JS Validator Minify & Compress 100% Private
Characters: 0 No Spaces: 0 Lines: 0 Statements: 0 Functions: 0
Formatted JavaScript will appear here...
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Online JavaScript Beautifier — JS Formatter Example

Before

const numbers = [1,2,3,4,5]; let total = 0; for (let i = 0; i < numbers.length; i++) { total += numbers[i]; } if (total % 2 === 0) { console.log(`The sum of the numbers is even:`); } else { console.log(`The sum of the numbers is odd:`); }

After

const numbers = [1, 2, 3, 4, 5]; let total = 0; for (let i = 0; i < numbers.length; i++) { total += numbers[i]; } if (total % 2 === 0) { console.log(`The sum of the numbers is even:`); } else { console.log(`The sum of the numbers is odd:`); }
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Powerful JavaScript Beautifier Features

✨

Beautify & Format

Convert messy, minified JavaScript into clean, readable, well-indented code with proper spacing.

📦

Minify & Compress

Reduce file size by removing whitespace, comments, and unnecessary characters for production.

🔍

JS Validator

Check your JavaScript for syntax errors, missing brackets, and common mistakes.

📊

Live Statistics

View character count, line count, statement count, and function count in real-time.

How to Use the JavaScript Beautifier

1

Paste Your JS

Copy and paste your JavaScript code into the input area, or click Sample to try it out.

2

Choose Mode

Select Beautify, Minify, Compress, or Validate based on your needs.

3

Customize Settings

Adjust indentation, add semicolons, or remove comments as needed.

4

Copy & Use

Copy the formatted output or download it as a JS file for your project.

💡 Pro Tip: Use Beautify for development and debugging. Use Minify or Compress before deploying to production for faster page loads.

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Frequently Asked Questions

A JavaScript Beautifier is a tool that formats and cleans up JavaScript code to make it more readable and maintainable. It adds proper indentation, line breaks, and spacing to messy or minified JS code.

Beautify adds formatting (spaces, line breaks, indentation) to make code readable. Minify removes all unnecessary characters (whitespace, comments, line breaks) to reduce file size for faster loading.

Yes! The Validate mode checks your JavaScript for syntax errors, missing brackets, missing semicolons, and other common mistakes. It highlights errors to help you fix them quickly.

Yes! All processing happens locally in your browser. Your JavaScript code never leaves your device — 100% private and secure.

All standard JavaScript features are supported including ES6+ syntax, arrow functions, classes, template literals, destructuring, spread operators, and async/await.

Yes! The Beautify mode preserves comments. If you want to remove comments, simply check the "Remove comments" option before formatting.

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Privacy & security notice

This JavaScript beautifier runs entirely in your web browser. No code is ever transmitted, stored, or logged by our servers. All processing is instant and completely private.