JS Beautifier – Format & Indent JavaScript Code Online Free

About the JS Beautifier

The JS Beautifier takes minified or poorly formatted JavaScript and reformats it into clean, properly indented code. Paste your script, choose your preferred indent size and character, and the tool restructures your code with consistent line breaks after every brace and statement — making it easy to read, debug, and maintain. If you need to shrink JavaScript instead of formatting it, try the JS Minifier.

This tool is built for developers who need to inspect, edit, or clean up JavaScript pulled from a minified source, a bundled file, or someone else’s code. Once your script is readable, you can also format any accompanying markup and styles with the HTML Beautifier and CSS Beautifier to keep your whole codebase consistent.

Our team tested the formatter with real JavaScript files to make sure it improves readability while keeping the original code logic unchanged.

How to Use the JS Beautifier

• Paste your unformatted JavaScript code into the JavaScript Input box.
• Choose an Indent Size: 2, 4, or 8 spaces.
• Choose an Indent Character: Space or Tab.
• Click Beautify JavaScript to generate the formatted result.
• Review the Original Size, Beautified Size, and Size Difference stats.
• Click Copy Code or Download .js to save your formatted script.

Example Usage

Input:

function example(){console.log('Hello World');}

Output (2-space indent):

function example() {
  console.log('Hello World');
}

This makes minified or single-line JavaScript far easier to read, review, and debug in a code editor. Before deploying your project, you can also run your code through our JS Minifier to reduce file size.

Frequently Asked Questions