LLM-Resistant Code Protection

Protect Your JavaScript Source Code

Defend your intellectual property from reverse engineering, tampering, theft, and AI-assisted analysis. Maximum-mode protection regenerates the decoder shape on every build — ChatGPT, Claude, and Copilot have no fixed signature to pattern-match against.

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Maximum mode · LLM-resistant

// Original code

function validateEmail(email) {

return /^[^\s@]+@[^\s@]+$/.test(email);

}

// After Maximum-mode protection

var validateEmail;(function(){

var s=271-260,key=decode('knimt…')

.substr(0,s),ev=decode[key]

('',decode('4f…3a'));

ev(8288);return 5275;})()

The Problem

How can I protect my JavaScript code?

JavaScript is a browser-interpreted language, so it must be visible to browsers on the front end. Unfortunately, anyone can read it by viewing the source code of the web page your script runs on.

There are two general ways to protect intellectual property: legally (copyrights, contracts) or technically (code protection). Code obfuscation is currently one of the best technical methods for protecting JavaScript from reverse engineering.

Obfuscation renders software unintelligible while keeping it functionally equivalent to the original code, making it highly resistant to reverse engineering.

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How It Works

What is obfuscation?

Obfuscation is the practice of methodically transforming source code — renaming variables, rearranging logic, hiding algorithms and data structures — all with the goal of making it virtually impossible to read while preserving full functionality.

With JavaScript Obfuscator, your code becomes impossible to understand, preventing anyone from stealing or modifying it.

100%

Safe & Reliable

ES2024+

Fully Compatible

Benefits

Why use a Code Obfuscator?

JavaScript source code can be easily viewed by anyone. This means anyone can steal your code, modify it, and reuse it. Code obfuscation encrypts the code and makes it unreadable while keeping it fully functional.

✓ Protect your code and intellectual property
✓ Compact JS to make file size smaller and increase page speed
✓ Works with jQuery, Node.js, React, Vue, and all JS frameworks
✓ Always preserves the operational qualities of the code

If you are releasing valuable software, obfuscation should be part of your application development process.

Advanced

Obfuscation & Protection Techniques

The goal of obfuscation is to make a program unintelligible without altering its functionality, making it extremely difficult for anyone to reverse-engineer your application.

JavaScript Obfuscator offers advanced techniques that go far beyond simple renaming, creating a layered defense that is resilient against automated deobfuscation tools.

Features

Obfuscation Features

Multiple protection layers working together to keep your code secure.

Name Obfuscation

Replaces identifiers with meaningless character sequences across your entire application, ensuring consistency of name changes across all files.

Code Flow Obfuscation

Changes control flow to produce spaghetti logic that leads to the same results but is extremely difficult for attackers to analyse.

Minification & Compression

Reduces file size and makes code more efficient, helping your application load faster while reducing bandwidth consumption.

Dead-Code Insertion

Inserts executable but semantically neutral code that makes disassembled output significantly harder to analyse.

String Encryption

Encrypts all string literals so attackers cannot search for strategic text in your code. Only the encrypted version exists in the output.

Powerful Locking

Lock your code to IP addresses, domain names, and more. Create trial versions with time limits and other advanced restrictions.

Release Workflow

Protection that fits real frontend delivery, not just demos

The strongest fit is after your application has already generated the JavaScript assets you plan to ship. Use the online tool to evaluate settings quickly, then move into the desktop and command-line workflow for larger releases, embedded JavaScript, and repeatable build steps.

Generated assets

Protect the files your existing build already produced instead of trying to redesign the rest of your toolchain around obfuscation.

Public names

Use exclusion controls and cross-file options so shared names and public integration points remain stable where they need to.

Repeatable releases

Generate the command line from the desktop project when you want your release process to apply the same protection settings every time.

Read Workflow Guide Open Command-Line Guide

Ready to protect your JavaScript?

Start obfuscating your code in seconds with our free online tool, or download the desktop app for batch processing.

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