JavaScript Obfuscator

Protect your JavaScript code by making it harder to understand and reverse engineer

Security Presets

Input JavaScript

Obfuscated Output

Free JavaScript Obfuscator - Protect Your JS Code Online

Protect your JavaScript code from reverse engineering with our free online JS obfuscator. Transform readable JavaScript into complex, unreadable code while maintaining functionality. Advanced obfuscation techniques including control flow flattening, string encoding, and variable renaming.

Key Features:

  • • Variable & function name mangling
  • • String array encoding & rotation
  • • Control flow flattening
  • • Dead code injection
  • • Debug protection mechanisms
  • • Self-defending code generation

Perfect For:

  • • Intellectual property protection
  • • Commercial web applications
  • • Premium plugin/library distribution
  • • Client-side algorithm protection
  • • Preventing code theft
  • • Licensing enforcement

How to Use JavaScript Obfuscator

1

Paste JavaScript Code: Copy your JavaScript code into the input editor on the left.

2

Choose Protection Level: Select from Low, Medium, or High protection based on your security needs.

3

Configure Options: Customize obfuscation settings like string encoding, control flow, and debug protection.

4

Obfuscate Code: Click “Obfuscate Code” to transform your JavaScript into protected code.

5

Download Results: Copy or download the obfuscated code for use in your projects.

Why Use Our JavaScript Obfuscator?

🛡️ Advanced Protection

Multiple layers of obfuscation including control flow flattening, string encoding, and anti-debugging.

⚙️ Customizable Options

Fine-tune protection levels and features to balance security with performance requirements.

🔒 Client-Side Processing

Your code never leaves your browser, ensuring complete privacy and security.

💯 Professional Grade

Uses industry-standard obfuscation techniques trusted by commercial applications.

JavaScript Obfuscation Techniques Explained

Identifier Renaming

Replaces meaningful variable and function names with short, cryptic identifiers making code unreadable.

String Array Encoding

Moves all strings into an encoded array and replaces string literals with array access calls.

Control Flow Flattening

Restructures code execution flow using switch statements to make logic harder to follow.

Dead Code Injection

Adds fake code blocks that never execute but make reverse engineering more difficult.

⚠️ Important Notes

• Obfuscation is not encryption - determined attackers can still reverse engineer your code

• Higher protection levels may significantly impact performance

• Always test obfuscated code thoroughly before deployment

• Keep backups of your original source code

• Some features may break strict mode or certain environments