JavaScript Beautifier
Free online JavaScript beautifier and code formatter. Instantly convert minified or messy JS into clean, readable, properly indented code with customizable options.
What does a JavaScript beautifier do?
A JavaScript beautifier reformats minified or messy JS code by adding proper indentation, line breaks, and spacing to make it easy to read, debug, and maintain.
How does the JS formatter work?
The formatter parses your JavaScript code and reconstructs it with consistent formatting based on your chosen indentation style (spaces or tabs) and indent size.
Is my JavaScript code sent to a server?
No, all formatting is performed locally in your browser. Your code never leaves your device, ensuring complete privacy and security.
Will beautification change my JavaScript functionality?
No, beautification only changes formatting and whitespace. The code logic, variables, and functionality remain completely identical.
What indentation options are available?
You can choose between 2-space, 4-space, or tab indentation to match your coding style or team conventions.
Can I format minified JavaScript?
Yes, the tool can instantly convert minified or compressed JavaScript into readable, well-formatted code with proper structure.
Does this work with ES6+ syntax?
Yes, the formatter supports modern JavaScript including ES6, ES7, ES8, and all current ECMAScript standards.
Is there a file size limit?
The tool can handle large JavaScript files efficiently, though very large files (over 10MB) may take longer to process depending on your device.
Can I use this offline?
Once the page loads, formatting works offline since all processing happens in your browser. No internet connection is required after initial load.
Does it validate JavaScript syntax?
The formatter will indicate if your code has syntax errors, but it's primarily designed for formatting rather than validation.
Can I format JSON or CSS with this tool?
This tool is specifically designed for JavaScript. For JSON or CSS formatting, you'll need dedicated formatters for those languages.
Why should I beautify my code?
Beautified code is easier to read, debug, and maintain. It's essential when working with minified third-party code or reviewing code quality.