Free JavaScript Formatter & Beautifier
Paste your minified or disorganised JavaScript below to instantly format it with proper indentation. Handles ES6+ syntax including arrow functions, destructuring and template literals.
About the JavaScript Formatter
This free JS formatter uses a token-based approach to reformat JavaScript code with consistent indentation and spacing. It handles common patterns including function declarations, arrow functions, object literals, arrays, if/else chains, for/while loops, try/catch blocks, and ES6+ syntax.
Use it to clean up minified vendor scripts, tidy auto-generated JavaScript, or prepare code for a code review.
How to Format JavaScript
Paste Your JS
Copy your minified or messy JavaScript and paste it into the input area.
Choose Indent
Select 2 spaces, 4 spaces or tabs to match your project style guide.
Format
Click "Format JS". The right pane shows the beautified output instantly.
Copy
Copy the formatted JavaScript to your clipboard with one click.
Frequently Asked Questions
This formatter is designed for standard JavaScript (ES5 – ES2022). TypeScript-specific syntax like type annotations, interfaces, and generics may not format correctly. For TypeScript, use a dedicated formatter like Prettier with the TypeScript plugin.
JSX syntax contains angle brackets that can be confused with comparison operators. For JSX formatting use a tool that understands JSX syntax such as Prettier or ESLint with the React plugin.
Yes. The tokenizer correctly identifies string literals (single, double, and template), regex literals, and comments, preserving their contents unchanged while reformatting the surrounding code structure.
Formatting adds whitespace for human readability. Minifying removes it for smaller file size. Use the JS Minifier to produce production-ready compact JavaScript.