JavaScript Beautifier

JavaScript Beautifier — Format Minified JS Code for Readability

The JavaScript Beautifier is a free online tool that takes minified or unreadable JavaScript code and reformats it with proper indentation, line breaks, and consistent style — making it instantly legible. Whether you are debugging third-party scripts, auditing production code for security issues, learning from open-source libraries, or simply reformatting messy code from a colleague, beautification reveals the structure that minification hides.

Why Beautify JavaScript?

Production JavaScript is usually minified to reduce file size and improve page load times. The result is a single dense line of obscure variable names with no whitespace, completely unreadable to humans. When you need to understand what minified code actually does — to debug an error, investigate a script you didn't write, or reverse-engineer a library — beautification adds back the spaces, newlines, and indentation that make the code's structure visible. Combined with a deobfuscator, beautification is the first step in any source-code analysis workflow.

How to Use the Beautifier

Paste your minified JavaScript into the input box, choose your preferred indentation (2 spaces, 4 spaces, or tabs), and click Beautify. The tool parses the code, applies modern formatting rules, and returns clean, properly indented source. Copy the beautified result to your clipboard with one click. The tool handles ES5, ES6+ modern syntax, arrow functions, async/await, destructuring, and JSX.

Common Use Cases

Developers debug minified third-party libraries. Security researchers analyze suspicious scripts. Students learn from open-source code. QA engineers audit production builds. This free, fast tool runs entirely in your browser — your code never touches a server, so even proprietary scripts stay private.

Tamer Baghdadi

CEO / Co-Founder