Free Online Tool · No Sign-up Required

Obfuscate Your JavaScript Code Instantly

Protect your source code from reverse engineering. Rename variables, encrypt strings, inject dead code, and more — right in your browser.

▶ Start Obfuscating See Features

Input JavaScript

Obfuscated Output

// Your obfuscated code will appear here...

⚙ Obfuscation Options

Compact Code

String Encryption

Dead Code Injection

Self-Defending

Debug Protection

Disable Console

Rename Globals

Unicode Escape

// Features

Powerful Protection, Zero Effort

Everything you need to shield your JavaScript from prying eyes.

🔀

Variable Renaming

All variable, function, and class names are replaced with meaningless identifiers like _0x3f2a.

🔐

String Encryption

String literals are encoded and hidden inside an array, decoded only at runtime — invisible to static scanners.

💀

Dead Code Injection

Synthetic unreachable code blocks are injected to confuse decompilers and automated analysis tools.

🛡️

Self-Defending

The obfuscated code detects formatting or tampering attempts and stops executing if modified.

🐛

Debug Protection

Continuous debugger statements prevent step-through debugging in browser DevTools.

🌐

Unicode Escaping

Identifiers and strings are converted to Unicode escape sequences, making code nearly unreadable.

// How It Works

Three Steps to Protected Code

Paste Your JavaScript

Copy your JS code into the input editor. Works with any JavaScript — ES5, ES6+, Node.js modules, browser scripts.

Configure Your Options

Choose from a range of obfuscation options. Toggle string encryption, dead code injection, debug protection, and more to balance protection vs. file size.

Download & Deploy

Click "Obfuscate Now", then copy or download your protected .js file. The output is fully functional — it runs exactly like the original.

// FAQ

Frequently Asked Questions

Is obfuscated JavaScript still functional?

Yes. Obfuscation transforms the code's appearance without altering its behavior. The obfuscated output runs identically to the original in any JavaScript engine.

Can obfuscated code be reversed or deobfuscated?

While no obfuscation is 100% irreversible, high-quality obfuscation with string encryption, dead code injection, and self-defending mode makes reverse engineering extremely time-consuming and costly for attackers.

Does obfuscation affect performance?

Slightly. Compact mode minimizes the overhead. Heavy options like dead code injection increase file size. For most use cases, the performance difference is negligible (<5%).

Is my code safe? Do you store it?

All obfuscation runs entirely in your browser using JavaScript. Your code is never sent to our servers. We do not log, store, or process your source code in any way.

Does it work with React, Vue, or Node.js code?

Yes. Our tool handles modern ES6+ syntax including arrow functions, template literals, destructuring, classes, and modules. For build-tool integration, use the javascript-obfuscator npm package.

Is this tool free to use?

Completely free, with no account required and no usage limits. All features are available to everyone.

Start Protecting Your Code Today

No registration. No limits. 100% browser-based and private.

🔒 Obfuscate Now — It's Free