JavaScript Formatter

Format JavaScript using AST parsing

JavaScript Input
Formatted Output
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What is JavaScript Formatting?

JavaScript formatting (beautifying) takes minified or messy code and makes it readable with proper indentation, line breaks, and spacing. Essential for debugging, understanding third-party code, and maintaining code quality. Our formatter uses AST parsing for accurate, semantic formatting.

Frequently Asked Questions

What's AST parsing?
Abstract Syntax Tree parsing understands code structure, not just text. This means our formatter knows the difference between code, comments, and strings, formatting accurately without breaking functionality.
Is this safe for my code?
Yes! All formatting happens in your browser—code never leaves your device. We don't store or transmit anything. It's 100% client-side.
Can I format JSX or modern JavaScript?
Our formatter supports ES2022+ syntax including arrow functions, async/await, optional chaining, and basic JSX. For advanced React formatting, consider additional tools.