JavaScript Obfuscator
Securely encrypt and obfuscate your JS code to protect it from reverse engineering.
Obfuscation Settings
How to Obfuscate JavaScript
Paste Your Code
Paste your raw, human-readable JavaScript code directly into the large input area at the top of the tool.
Select Protections
Toggle advanced settings like String Encoding, Control Flow Flattening, or Dead Code Injection to increase security.
Obfuscate & Save
Click "Obfuscate Code". Instantly copy the resulting garbled script to your clipboard or download it as a .js file.
Advanced Obfuscation Features
Control Flow Flattening
This feature flattens the logical structure of your code, converting simple if/else statements into highly complex, randomized switch statements that are agonizing to read.
100% Client-Side Privacy
Your proprietary code is processed entirely within your browser. We never send your scripts to our servers, ensuring your intellectual property remains completely confidential.
Dead Code Injection
To confuse malicious actors and automated decompilers, this tool randomly injects blocks of valid, non-executing dummy code directly into your script.
Frequently Asked Questions
JavaScript obfuscation is a security technique used to make your source code exceedingly difficult for humans and automated tools to read and reverse-engineer. It renames variables to meaningless characters, encrypts strings, and alters the logical flow of the code—all while ensuring the script still functions exactly as originally intended in the browser.
Because JavaScript executes directly in the user's browser, it can never be 100% mathematically secure. While simple formatting (minification) can be easily reversed, advanced obfuscation (using Control Flow Flattening and String Encryption) creates a massive, tangled web of logic. While a highly determined hacker with enough time could technically decipher it, it acts as an incredibly strong deterrent.
It can. Basic obfuscation (renaming variables) has no performance impact. However, if you enable advanced settings like Control Flow Flattening or Dead Code Injection, the file size of your script will increase significantly, and the browser will have to work harder to execute it. We recommend only using advanced settings on highly sensitive files (like game logic or proprietary algorithms), rather than standard UI scripts.
Minification aims to make a file as small as possible by removing spaces, line breaks, and shortening variable names. Its goal is performance. Obfuscation aims to make code impossible to understand. While it often includes minification, its primary goal is security, and it will often intentionally increase file sizes to hide logic.
Absolutely not. This tool utilizes the official javascript-obfuscator library entirely within your local web browser. Your proprietary code is processed instantly on your own machine. No data is ever transmitted, logged, or saved to the Toolszu servers.
When this setting is checked, the obfuscator actively searches for functions like console.log(), console.info(), and console.error() in your code and automatically replaces them with empty functions. This prevents internal debugging data from leaking to users inspecting the browser console.