JS Obfuscator
Mangle variable and function names, compress code structure, and make your JavaScript significantly harder to read and reverse-engineer.
How JavaScript Obfuscation Works
This obfuscator uses Terser with aggressive optimisation settings to transform your code. It mangles
all variable and function names to short identifiers, collapses expressions into sequences, inlines
functions where possible, and removes all formatting. Properties prefixed with an underscore
(_) are also mangled for deeper obfuscation.
The obfuscated code remains functionally equivalent to the original - it produces the same outputs for the same inputs - but is much harder for humans to understand.
Obfuscation Techniques
Name Mangling
All local variables, function parameters, and top-level declarations are renamed to short, meaningless identifiers.
Expression Collapsing
Multiple statements are combined into comma-separated sequences and ternary expressions to reduce readability.
Property Mangling
Object properties starting with an underscore are mangled to break object API patterns.
When to Use Obfuscation
Client-Side Protection
Protect proprietary logic, licensing checks, or business rules in JavaScript delivered to end users.
Intellectual Property
Make it harder for competitors to copy or understand your front-end application logic and algorithms.
Anti-Tampering
Raise the barrier for modifying injected scripts, game code, or embedded widgets.
Size Reduction
Obfuscation also reduces file size as a side effect of name shortening and code compression.