JavaScript Obfuscator

Secure your JavaScript code with advanced obfuscation. Features control flow flattening, string encryption, dead code injection, and anti-debugging protection. 100% private.

Code Protection

Hardened JS Engine

medium Protection

Original Size:0.00 KB

Obfuscated Size:0.00 KB

Client-Side Processed

Protection Settings

Protection Level

Balanced security and performance penalty.

String Encoding

Environment

Security vs Performance

Advanced features like "Control Flow Flattening" and "RC4 String Encoding" (enabled in High level) significantly increase file size and execution time.

Source Code

Obfuscated Code

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How to Use

The Professional JavaScript Obfuscator protects your code from reverse engineering by transforming it into an unreadable, hardened format.

How to use this tool

Paste Code: Enter your JavaScript into the "Source Code" editor on the left.
Select Protection Level: Choose Low (fastest), Medium (balanced), or High (maximum security). High level includes advanced transformations like Control Flow Flattening and RC4 String Encoding.
Configure Features: Enable anti-debugging (stops DevTools from working), self-defending (detects code formatting), or dead code injection (adds fake code to confuse reverse engineers).
Review & Download: The obfuscated code appears instantly in the right panel. Click the Download button to save it as a `.js` file.

About This Tool

Why Obfuscate?

Unlike minification (which simply reduces file size), obfuscation actively defends your intellectual property. It renames variables to meaningless hex strings, extracts and encrypts literal strings, and flattens the control flow so the logical sequence of your program is hidden.

Warning: Obfuscation fundamentally changes how your code executes. Features like "Self Defending" will cause your code to enter an infinite loop if someone tries to format ("beautify") it. Always test your obfuscated code thoroughly before deployment.

Why Use This Tool

100% Private Processing

If you are obfuscating code, it means it contains sensitive logic you want to protect. Sending it to a remote server for obfuscation defeats the purpose. Our tool uses WebAssembly to run the obfuscation engine entirely inside your browser. Your source code never leaves your device.

FAQ

What obfuscation techniques are applied?

Control flow flattening, string encryption with a constants array, dead code injection, anti-debugging protection, self-defending against formatting, and identifier renaming.

Does obfuscation affect performance?

Yes, but the impact varies depending on the techniques used. Basic obfuscation (renaming) has minimal impact. Advanced techniques like control flow flattening can reduce performance by 20-50%.

Does obfuscation make my code completely secure?

No. Obfuscation significantly increases the difficulty and time required for reverse engineering, but a determined attacker with enough time can eventually analyze the code. It is a barrier, not a definitive solution.