JavaScript Beautifier & Formatter - Online JS Code Styler

A JavaScript beautifier (also called a JS formatter or pretty printer) is a tool that takes minified, obfuscated, or poorly formatted JavaScript code and reformats it with proper indentation, line breaks, and spacing. This makes the code more readable and easier to debug or maintain. Our online JS beautifier uses industry-standard formatting algorithms to restyle your code instantly without altering its functionality.

Simply paste your JavaScript code into the Input panel on this page, adjust the formatting options (indent size, brace style, etc.) to your preference, and click the Beautify button. The formatted code will appear in the output panel. You can then copy it to your clipboard or download it as a .js file. The tool is completely free with no registration required.

Properly formatted JavaScript code offers several benefits: (1) Improved readability for developers and collaborators; (2) Easier debugging since well-structured code reveals logical flow; (3) Better code review experience in version control systems like Git; (4) Consistent style across a team when using uniform formatting rules; (5) Faster onboarding for new developers reading the codebase.

The most common indent sizes for JavaScript are 2 spaces and 4 spaces. Popular style guides like Airbnb and Google recommend 2 spaces, while many developers prefer 4 spaces for better visual distinction. Tabs are also used but less common in JS. This tool lets you choose between 2, 4, or 8 spaces, or use tabs, so you can match your project's existing convention.

Yes! This tool includes a Minify feature that compresses your JavaScript code by removing unnecessary whitespace, comments, and line breaks. Minification reduces file size, which helps web pages load faster. Click the Minify button to compress your code, then copy or download the minified version for production use.

Brace style determines where opening curly braces { are placed relative to the preceding statement. Collapse (K&R style) places the brace on the same line as the statement — this is the most common in JavaScript. Expand (Allman style) places braces on a new line. End-Expand puts only closing braces on new lines. Choose the style that matches your team's coding standards.

Absolutely. All formatting and minification happens entirely in your browser using client-side JavaScript. Your code is never sent to any server, stored, or logged. You can safely format proprietary or sensitive JavaScript code without privacy concerns. The tool works offline once the page is loaded.

The beautifier will attempt to format any JavaScript-like code you provide. However, it does not perform full syntax validation. If your code contains syntax errors, the output may be unexpected or the formatting may not apply correctly. We recommend using a JavaScript linter (like ESLint) alongside this tool for catching syntax issues in your code.

While this tool is optimized for JavaScript, JSON code (which is a subset of JavaScript) can also be formatted here. For dedicated JSON formatting with additional features like tree view and validation, we recommend using a specialized JSON formatter tool. However, simple JSON objects and arrays will format correctly in this beautifier.

Beautifying (or pretty-printing) expands code by adding indentation, line breaks, and spacing to maximize readability. This is ideal for development and debugging. Minifying does the opposite — it removes all unnecessary characters (whitespace, comments, line breaks) to create the smallest possible file size for production deployment, reducing bandwidth usage and improving page load speed. Both operations preserve the original functionality of your code.