JavaScript Obfuscator

Does this tool upload my JavaScript code to any server?

No. The obfuscation process happens entirely inside your web browser using client-side libraries. Your code never leaves your computer.

Will obfuscated code run slower than my original code?

Yes, slightly. Advanced protections like 'Control Flow Flattening' and 'String Encryption' add extra steps for the browser to execute. For most applications, the performance difference is negligible, but avoid heavy obfuscation on performance-critical loops.

Can obfuscated code be reversed or decompiled?

Obfuscation makes code extremely difficult to read, but not impossible to reverse-engineer with enough time and effort. It stops casual copying and theft, but it is not a replacement for server-side security.

What does 'Control Flow Flattening' do?

It transforms the structure of your code (loops, if-statements) into a complex switch-statement structure. This destroys the visual shape of your logic, making it very confusing for humans to follow.

Why does the file size increase after obfuscation?

Obfuscation adds dummy code, wrapper functions, and expanded logic to hide the real intent of your script. This naturally increases the file size compared to the original or minified version.

Does this tool also minify my code?

Yes. By default, the 'Compact' option is enabled, which removes whitespace and comments, effectively minifying the code while it obfuscates it.

Can I use this for Node.js applications?

Yes. You can select 'Node.js' from the Target Environment dropdown to ensure the obfuscated code is compatible with server-side environments.