JavaScript Beautifier - Format and Beautify JavaScript Online
Free online JavaScript beautifier tool to format, validate, and beautify JavaScript code with proper indentation and syntax highlighting.
JavaScript Beautifier & Formatter
Format and beautify your JavaScript code
Input
Output
Formatted JavaScript will appear here
Paste JavaScript in the input area to get started
How to Beautify JavaScript - Step by Step Guide
Input Your JavaScript Code
Let's get your JavaScript code into the beautifier! You have several convenient options:
Example: Minified JavaScript Input
Here's what minified, hard-to-read JavaScript looks like:
function calculateTotal(items){let total=0;for(let i=0;i<items.length;i++){total+=items[i].price*items[i].quantity;}return total;}const cart={items:[{name:"Laptop",price:999.99,quantity:1},{name:"Mouse",price:29.99,quantity:2}],discount:0.1};console.log(calculateTotal(cart.items));
Automatic Formatting & Beautification
The beautifier instantly transforms your code! As soon as you input JavaScript, the formatter automatically:
Example: Beautifully Formatted Output
The same code, now properly formatted and readable:
function calculateTotal(items) { let total = 0; for (let i = 0; i < items.length; i++) { total += items[i].price * items[i].quantity; } return total; }
Choose Format Options
Customize your output based on your needs! The beautifier gives you control over how your JavaScript appears:
Export Your Formatted JavaScript
Get your perfectly formatted JavaScript ready for use! Multiple export options make it easy to integrate into your workflow:
Frequently Asked Questions
How do I beautify minified JavaScript code?
Simply paste your minified JavaScript into the beautifier. The tool automatically adds proper indentation, line breaks, and spacing to make your code readable. It handles complex nested structures and preserves code functionality.
Can I both beautify and minify JavaScript in the same tool?
Yes! Switch between "Beautify" mode for readable formatting and "Minify" mode for compressed code. Perfect for development (beautified) and production (minified) use cases. For dedicated minification, check out our JavaScript Minifier.
Does the beautifier fix JavaScript syntax errors?
The beautifier formats valid JavaScript code but doesn't fix syntax errors. It will attempt to format the code and may show warnings if it encounters issues. Make sure your code is syntactically correct before beautifying.
Can I beautify large JavaScript files?
Absolutely! The beautifier handles large JavaScript files efficiently. For very large files, the tool processes them smoothly while maintaining perfect formatting and syntax highlighting.
Is the beautified JavaScript compatible with all browsers?
Yes! The beautifier only formats your code and doesn't change its functionality. The formatted JavaScript maintains the same browser compatibility as the original code. It works with ES5, ES6, and modern JavaScript syntax.
Is the JavaScript beautifier completely free?
Yes, totally free with no limitations on file size, usage frequency, or features. No registration required, and you can beautify unlimited JavaScript files with full syntax highlighting.