JavaScript Formatter

Beautify and format your JavaScript code with proper indentation, spacing, and line breaks. Customize quote style, brace placement, and more.

Formatting Options

Indent Size

Quote Style

Brace Style

Semicolons

Input JavaScript

Formatted JavaScript

Make Your JavaScript Readable

Turn messy, minified, or poorly formatted JavaScript into clean, readable code. Our formatter applies consistent indentation, spacing, and line breaks following industry best practices.

ES6+ Ready

Why Use This Tool?

Clean Indentation

Transform messy code into properly indented, easy-to-read JavaScript.

Unminify Code

Expand minified JavaScript into readable format for debugging and analysis.

Customizable Style

Control indentation, quote style, brace placement, and semicolon handling.

100% Private

All processing happens in your browser. Your code is never sent to any server.

How this JavaScript Formatter works

This code beautification tool restructures JavaScript source code applying consistent indentation, spacing, and line breaks transforming minified or poorly formatted scripts into readable code following industry conventions. The formatter parses JavaScript syntax including ES6+ features (arrow functions, template literals, destructuring), applies configurable formatting rules (indent size, quote style, semicolon preferences), and outputs beautified code preserving functional behavior. Users paste unformatted JavaScript receiving instantly restructured output, configure style preferences matching team standards (Airbnb, Standard, Google style guides), and preview changes before applying. Batch processing handles multiple files simultaneously, integration with linters validates syntax correctness during formatting, and diff views highlight formatting changes verifying no logic alterations occurred. Applications include debugging minified production code, preparing code for reviews enforcing readability, standardizing team codebases through automated formatting, or restructuring legacy code before refactoring. The formatter recognizes JSX syntax, handles embedded comments appropriately, and outputs code compatible with modern build tools.

How to Use

Paste or Upload

Enter your JavaScript code or upload a .js file.

Configure

Choose formatting options (indent, quotes, braces).

Export

Copy or download the formatted JavaScript.

Example Usage

Formatting JavaScript with proper indentation and spacing.

Input

function hello(){console.log('world')}

Output

function hello() { console.log('world'); }

Frequently Asked Questions

What does a JavaScript Formatter do?

It beautifies JavaScript by applying consistent indentation, spacing, and line breaks. This makes messy or minified code much easier to read and debug.

Will formatting change how my JavaScript runs?

No. Formatting changes whitespace and layout, not the logic. Your code should behave the same, as long as the input is valid JavaScript.

Can it format minified or obfuscated JavaScript?

It can usually format minified code into readable blocks. Obfuscated code may still look confusing because names and structure were intentionally made hard to read.

What should I do if the formatter throws an error?

The most common cause is invalid syntax. Check for missing brackets, unfinished strings, or pasted HTML mixed into JS. Fix the syntax and run the formatter again.

Is this JavaScript Formatter secure?

Yes. It runs 100% client-side, so your code is processed in your browser and never uploaded to a server.

Related Tools

The JS Formatter 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.

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