JavaScript Formatter

Beautify and format JavaScript code with configurable options. Clean up messy code, apply consistent styling, and improve readability.

Formatting Options

Indent Size

Quote Style

Brace Style

Semicolons

Input JavaScript

Formatted JavaScript

How It Works

The JS Formatter runs entirely in your browser using JavaScript. Unlike other tools that send your data to a server, we process everything locally on your device. This guarantees 100% privacy and blazing fast speed.

No server interaction – data never leaves your device
Instant results since there is no network latency
Works offline once the page is loaded
Free to use with no usage limits

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 formatting options are available?

You can customize indent size, quote style (single/double), brace style (collapse/expand), and semicolon handling.

Does it validate JavaScript syntax?

Yes! The formatter will detect and report syntax errors in your code.

Can I format multiple files?

Upload one file at a time, format it, download, and repeat for multiple files.

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Diff Checker

Compare two text files or blocks of code to see the differences (additions, deletions, and changes).

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.