JavaScript Code Protection
Protect the JavaScript your customers download.
Browser code is visible by design. JavaScript Obfuscator turns readable JavaScript into protected output that is harder to understand, copy, modify, and reuse while preserving how your site works. Start online, then use the desktop app for larger folders and mixed-file projects.
Readable code becomes protected code
// Original code
function validateEmail(email) {
return /^[^\s@]+@[^\s@]+$/.test(email);
}
// After 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
JavaScript that runs in a browser must be delivered to the browser. That also means competitors, copycats, and curious users can inspect the file unless you protect it before publishing.
Obfuscation is a practical way to protect browser code. It changes names, strings, and structure so the file still runs, but becomes far harder to read and reuse.
Use it when your JavaScript contains product logic, licensing checks, business rules, game logic, or other work you do not want copied easily.
How It Works
Obfuscation transforms readable code into a harder-to-understand version. Names become meaningless, strings are hidden, and the program flow becomes less obvious.
The result is still JavaScript, so browsers can run it, but people looking at the file no longer see the clear source code you wrote.
Benefits
JavaScript source code can be viewed by anyone after it is published. Obfuscation helps reduce copying, casual modification, and reverse engineering by making the published file difficult to follow.
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✓
Protect your code and intellectual property
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✓
Compact JS to make file size smaller and increase page speed
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✓
Works with common JavaScript libraries and web frameworks
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✓
Keeps protected code working for real users
If you are releasing valuable software, obfuscation should be part of your application development process.
Advanced
Basic protection helps against casual copying. Stronger protection hides more clues and makes valuable code harder to study.
Choose the level that matches your project: simple scripts can start with Standard, while commercial code should usually use Maximum.
Features
These features work together to remove the clues people use to understand and copy JavaScript.
Name Obfuscation
Replaces meaningful names with short, meaningless names so the purpose of the code is harder to understand.
Code Flow Obfuscation
Changes the path through the code so the protected file is harder to follow by reading from top to bottom.
Minification & Compression
Reduces file size and makes code more efficient, helping your application load faster while reducing bandwidth consumption.
Dead-Code Insertion
Adds extra logic that makes the protected file more confusing without changing what it does.
String Encryption
Hides readable text values so people cannot simply search the file for important words and clues.
Powerful Locking
Lock your code to IP addresses, domain names, and more. Create trial versions with time limits and other advanced restrictions.
How To Start
Start with a small sample in the browser. When you are happy with the result, use the desktop app to protect full folders, larger files, or embedded JavaScript.
Paste a small sample and compare the readable version with the protected version.
Protect larger folders and web files from your Windows desktop.
Upgrade when you need more monthly volume, bigger files, or stronger protection.
The protection engine is the same everywhere — what changes is where your code ends up and how your build pipeline is wired. Pick the guide that matches what you ship.
Protect a production React build without breaking hydration or your bundler output.
Work out which half of your Next.js app is actually public, then protect that.
Why an Angular production build being minified is not the same as being protected.
Your Vue bundle is minified — anyone can still read it. Close that gap.
You don’t obfuscate TypeScript — you obfuscate the JavaScript it compiles to.
Once Node.js code leaves your servers, it becomes readable. Protect what you distribute.
Every Electron app ships its source inside the package. Extract your own asar and look.
Anything you publish to the Chrome Web Store can be unpacked and read.
The compiler makes your components disappear into clean, readable JavaScript.
“It’s a native app” is not protection when the payload is still JavaScript.
An APK is a zip file — and Hermes bytecode is a speed bump, not a wall.
Your game ships its rules to every player. Make cheating expensive.
What you can and cannot obfuscate in a plugin distributed through wordpress.org.
Start obfuscating your code in seconds with our free online tool, or download the desktop app for batch processing.