JavaScript Beautifier

Beautify, format, and unminify your JavaScript code. Free online tool to improve JS readability and structure.

Formatting Options

Indentation

Brace Style

Preserve Newlines

Input JavaScript

Upload

function test(){console.log("Hello World");if(true){return;}}

function test(){console.log("Hello World");if(true){return;}}

Formatted JavaScript

JavaScript Beautifier

Format, indent, and beautify your JavaScript code online. Unminify and clean up messy scripts instantly.

JS Standard

Formats code according to standard JavaScript style guidelines.

Customizable

Choose indentation size and brace styles to match your preference.

Unminify

Perfect for unpacking compressed scripts to understand how they work.

Bug Free

Clean, consistent code makes it easier to spot errors and debug your logic.

How this JavaScript Beautifier works

This formatting tool takes minified or messy JavaScript code and reorganizes it into a clean, readable structure. It applies consistent indentation, adds line breaks, and spaces out operators according to best practices. Built on the robust js-beautify engine, it runs entirely in the browser, ensuring your proprietary code is never sent to a server. Features include options to control indentation size, brace style (`K&R` vs. `Allman`), and preservation of newlines. Ideal for reverse-engineering minified library code, debugging legacy scripts, or enforcing a style guide on quick snippets.

How to Use

Paste JS

Paste your minified or messy JavaScript code.

Config

Adjust indentation and brace style settings.

Result

Copy the beautifully formatted code.

Example Usage

Here's a typical example of how this tool transforms your data:

Input

function foo(){bar()}

Output

function foo() { bar() }

Frequently Asked Questions

Does it unminify code?

Yes, it restores structure to minified code by adding line breaks and indentation, making it readable again.

Is my code safe?

Yes, all formatting happens in your browser. No code is sent to any server.

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The JavaScript Beautifier is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.