JavaScript Formatter & Beautifier

Beautify minified or obfuscated JavaScript with proper indentation and formatting using js-beautify.

Processed in your browser. No data is sent to our servers.

How to Format JavaScript Online

Reading minified JavaScript is nearly impossible without formatting. Paste your compressed or poorly-indented code into the input field, choose your preferred indentation size, and click Format JavaScript. The tool uses the industry-standard js-beautify library to produce clean, consistently-indented output. It handles ES6+ syntax including arrow functions, template literals, destructuring, and async/await. The formatted result appears instantly with proper line breaks and spacing that you can copy back into your editor or include in documentation.

Why Format JavaScript Code?

Code readability directly impacts developer productivity. When debugging production issues, you often start with a minified bundle. Formatting that code is the first step toward understanding the execution flow. This tool is also useful for code reviews, learning from open-source libraries, and standardizing style before running a linter. The formatting engine runs entirely in your browser — your source code is never transmitted to a server, making it safe for proprietary or sensitive codebases. There is no file size limit beyond your browser memory.

Frequently Asked Questions

The formatter handles standard JavaScript syntax. TypeScript-specific features like type annotations may not format perfectly.

No. Formatting only changes whitespace and line breaks. The logic and behavior remain identical.

This tool uses js-beautify, a widely-used open-source JavaScript beautifier that supports JS, CSS, and HTML.

It can make obfuscated code more readable by adding indentation, but it cannot rename variables or reverse obfuscation techniques.

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