JavaScript Beautifier

JavaScript Beautifier reformats minified or obfuscated-looking JavaScript into properly indented, readable code. It's free to use and needs no sign-up, so you can beautify a script the moment you need to inspect it. Developers debugging third-party libraries, students learning JavaScript, and anyone reviewing a bundled file will find this tool valuable.

Why use JavaScript Beautifier?

Minified JavaScript packs an entire application onto a handful of lines, which makes stepping through logic in a debugger or code review nearly impossible without reformatting. This tool restores standard indentation, adds line breaks after statements, and spaces out function bodies and braces so the code's structure becomes visible again. It's often the first step when investigating what a bundled or minified third-party script actually does.

How to use JavaScript Beautifier

1. Paste the minified or compressed JavaScript into the input field.
2. Click beautify to reformat the code instantly.
3. Copy the readable code for debugging or review.

Key features

• Restores indentation and line breaks for functions, loops, and conditionals.
• Handles modern ES6+ syntax including arrow functions and template literals.
• Runs entirely in your browser with no file uploaded to a server.
• Free with no sign-up and no limit on how often you use it.

Related tools

Compress the code back down with the JavaScript Minifier, or explore the JavaScript Deobfuscator if variable names have been scrambled too.

Frequently asked questions

Is JavaScript Beautifier free?

Yes, this tool is completely free to use and doesn't require creating an account. You can beautify as many scripts as you need.

Does beautifying JavaScript change how it runs?

No, reformatting only affects whitespace, indentation, and line breaks, not the actual logic or execution order. The script behaves identically before and after beautifying.

Is beautifying the same as deobfuscating?

No, beautifying only restores formatting, while obfuscated code often has renamed variables and restructured logic that formatting alone won't undo. For scripts with scrambled variable names, the JavaScript Deobfuscator is the more appropriate tool.

Can it beautify JSON or JSX as well?

Standard JSON often beautifies cleanly since it shares JavaScript's basic syntax, but JSX and framework-specific syntax extensions aren't guaranteed to format perfectly. For plain JavaScript and JSON, results are generally reliable.