How to Use This Tool

1. Paste your JavaScript code or HTML with script tags into the input editor
2. Choose formatting preferences: indentation style and brace placement
3. Click Beautify to format code with proper structure and spacing
4. Use Minify to compress code for production deployment
5. Select obfuscation level and click Obfuscate for code protection
6. Apply Deobfuscate to make obfuscated code more readable
7. Convert external scripts to Self-Contained Script format
8. Download results or copy to clipboard using the toolbar buttons

Key Features

• Advanced Obfuscation: Three security levels with variable renaming, string encoding, and control flow protection
• HTML Script Support: Process JavaScript within HTML script tags seamlessly
• Self-Contained Conversion: Transform external script references into standalone modules
• Real-time Syntax Validation: Check code for errors before processing
• Multiple Format Styles: Support for K&R, Allman, and End-expand brace styles
• Compression Statistics: Track file size reduction after minification
• URL Loading: Import JavaScript files directly from web URLs

Obfuscation Levels Explained

• Low: Basic variable renaming and whitespace removal - minimal performance impact
• Medium: String encoding, member transformations, dead code injection - moderate protection
• High: Control flow flattening, debug protection, domain locking - maximum security

Frequently Asked Questions

What is JavaScript formatting and why is it important?

JavaScript formatting organizes code with proper indentation, spacing, and line breaks to improve readability and maintainability. Well-formatted code helps developers understand logic flow, spot errors faster, and collaborate more effectively. Our formatter supports multiple style conventions including K&R, Allman, and custom spacing preferences.

How does JavaScript obfuscation protect my code?

JavaScript obfuscation transforms readable code into functionally equivalent but difficult-to-understand code by renaming variables, encoding strings, flattening control flow, and injecting dead code. This protects intellectual property, prevents code tampering, and makes reverse engineering significantly harder. We offer three protection levels from basic to maximum security.

What\'s the difference between minification and obfuscation?

Minification removes unnecessary characters (whitespace, comments, line breaks) to reduce file size for faster loading, while maintaining code functionality and relative readability. Obfuscation deliberately makes code unreadable for security purposes, often increasing file size. Use minification for production deployment and obfuscation for code protection.

Can I format JavaScript embedded in HTML files?

Yes! Our formatter automatically detects and processes JavaScript within HTML script tags. Simply paste your HTML file containing script tags, and the tool will format the JavaScript content while preserving the HTML structure. It works with inline scripts, external script references, and mixed content.

How does the self-contained script feature work?

The self-contained script converter transforms external script references and inline code into a single, portable JavaScript module. It wraps code in immediately invoked function expressions (IIFEs) to prevent global scope pollution and converts external script tags into dynamic loaders. This is perfect for creating standalone widgets or embedding scripts without dependencies.

Is the JavaScript formatter safe and private?

Absolutely. All processing happens entirely in your browser using client-side JavaScript. No code is uploaded to servers, stored in databases, or transmitted over networks. Your code remains completely private and secure. This also means the tool works offline once loaded and processes files of any size instantly.

What file formats and sizes are supported?

We support JavaScript (.js, .mjs), JSX (.jsx), TypeScript (.ts, .tsx), and HTML files with embedded scripts. Since processing occurs client-side, there are no file size limitations. The tool handles everything from small snippets to large application bundles efficiently.

Can heavily obfuscated code be fully reversed?

While our deobfuscator can improve readability by decoding strings, formatting code, and simplifying some transformations, heavily obfuscated code (especially with high-level protection) cannot be fully restored to its original form. Variable names, comments, and original structure are permanently lost during obfuscation. The deobfuscator helps analyze code but isn\'t a complete reversal tool.

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