JavaScript Obfuscator
Obfuscate JavaScript code to protect your source code
Input
Obfuscated Output
What is JavaScript Obfuscator?
Need to protect your JavaScript source code? JavaScript Obfuscator transforms your readable code into a scrambled version that's harder to understand and reverse-engineer. Perfect for protecting intellectual property, preventing code theft, or making it harder for others to copy your work.
According to MDN Web Docs, obfuscation makes code harder to read while maintaining functionality. Our obfuscator transforms variable names, adds complexity, and scrambles your code structure – but your code still works exactly the same. Great for protecting client-side code or proprietary algorithms.
Everything happens in your browser – your code never leaves your computer. Obfuscate, download, and use your protected JavaScript right away.
What Makes This Tool Different
Code Protection
Transform readable code into scrambled, hard-to-understand JavaScript. Variable names become meaningless, code structure gets complex, making reverse engineering much harder.
Functionality Preserved
Your code works exactly the same after obfuscation. All functionality is preserved – only readability is changed. Perfect for protecting code without breaking it.
Variable Name Mangling
Variable and function names are transformed into meaningless characters. Makes it nearly impossible to understand what your code does just by reading it.
File Upload Support
Got a big file? Just upload it. Works great for obfuscating those massive JavaScript libraries or application files without copy-pasting.
Download Obfuscated JS
One click to download your obfuscated JavaScript file. Perfect for protecting your code before deploying to production or sharing.
Syntax Validation
We validate your JavaScript before obfuscating. Invalid code gets caught early, so you know the obfuscated version will work correctly.
How It Works
Paste or Upload JavaScript
Paste your JavaScript code into the left editor, or click "Upload" to load a file. You can also click "Sample" to see an example. The tool accepts any valid JavaScript code.
Automatic Obfuscation
As soon as you paste, the obfuscator processes your JavaScript and displays the scrambled version on the right. Variable names are mangled, code structure is transformed, making it much harder to understand.
Download or Copy
Click "Download" to save the obfuscated JavaScript file, or "Copy" to copy it to your clipboard. The obfuscated code is ready to use and will work exactly like your original code.
When You'd Actually Use This
Code Protection
Protect your JavaScript source code from being easily copied or reverse-engineered. Makes it harder for others to understand your algorithms or steal your code.
Intellectual Property
Safeguard proprietary algorithms or business logic. Obfuscation adds a layer of protection for client-side code that can't be hidden on the server.
License Protection
Make it harder to bypass license checks or copy protection mechanisms. Obfuscated code is much more difficult to modify or crack.
Competitive Advantage
Protect your competitive edge by making your code harder to analyze. Competitors will have a much harder time understanding your implementation.
Common Questions
Is my JavaScript code stored?
Nope. Everything happens right in your browser. Your code never leaves your computer – we don't even see it.
Does obfuscation break my code?
No. Obfuscated JavaScript works exactly the same as your original code. All functionality is preserved – only readability is changed.
Can obfuscated code be reversed?
Obfuscation makes code much harder to understand, but determined attackers with enough time can still reverse-engineer it. It's a deterrent, not absolute protection.
Does it affect performance?
Minimal impact. Obfuscated code might be slightly larger or slower, but the difference is usually negligible. The protection benefit outweighs any minor performance cost.
Can I deobfuscate it back?
You can use our JavaScript Deobfuscator to try to reverse it, but full restoration isn't always possible. Keep your original code safe!
Does it work with large files?
Yep. Since everything happens in your browser, it depends on your device. Small files obfuscate instantly. Very large files (several MB) might take a few seconds.
Other JavaScript Tools You Might Need
Obfuscation is just one JavaScript task. Here are other tools that work well together:
Need to learn more about JavaScript? Check out the comprehensive guide on MDN or the official ECMAScript specification.