JavaScript Obfuscator
Obfuscate JavaScript source code in-browser with identifier mangling, string encoding, comment stripping, and whitespace compaction. 100% client-side, no uploads.
Loading tool...
What is JavaScript Obfuscator?
The JavaScript Obfuscator is a free, browser-based tool that transforms readable JavaScript source into hard-to-understand code using identifier mangling, hex string encoding, comment stripping, and whitespace compaction. Toggle each technique independently to control the level of obfuscation — all processing happens locally in your browser with no uploads.
Key Benefits
- Deters casual copying and reverse-engineering of client-side code
- Reduces file size by stripping comments and whitespace
- Four independent techniques you can mix and match
- 100% private — code never leaves your browser
- No sign-up, no watermarks, completely free
Common Use Cases
- •Protect intellectual property in browser-based apps and games
- •Make it harder to steal client-side logic in commercial products
- •Reduce payload size alongside minification
- •Deter automated scraping of proprietary algorithms
- •Obfuscate embeddable widgets and third-party scripts
How to Obfuscate JavaScript
- Paste your code: Paste your JavaScript source into the left input box, or click "Sample" to load example code.
- Choose techniques: Toggle the four options — Strip Comments, Mangle Identifiers, Encode Strings, Compact Whitespace — to control how aggressively the code is obfuscated.
- Review the output: The obfuscated result appears instantly in the right panel. Compare original and obfuscated file sizes below.
- Copy or download: Click "Copy" to copy the result to your clipboard, or "Download" to save it as an obfuscated .js file.
Key Features
- Identifier mangling renames variables to unreadable hex-style names
- String encoding converts literals to hex escape sequences
- Removes both line (//) and block (/* */) comments automatically
- Compacts whitespace and line breaks outside string literals
- 100% client-side — your code never leaves the browser