📖 Description
1. Why is JavaScript Obfuscation Needed?
Since JavaScript runs as plaintext scripts on the client side, any user can obtain your logic by "viewing the source code":
- Protect Intellectual Property: Hide complex business logic, encryption algorithms, or unique functional implementations to prevent copying by competitors.
- Increase Reverse Engineering Difficulty: Make it harder for decompilation tools and reverse engineers by changing variable names, scrambling control flow, encrypting strings, and other means.
- Enhance Security: Remove comments, debug information from the code, and encode sensitive information to reduce the risk of vulnerability exploitation.
- Counter Automated Crawlers: Add an obfuscation layer to dynamically rendered web pages, increasing the cost for crawlers to analyze API call logic.
2. Core Features Explained
This site's tool integrates multiple advanced obfuscation strategies, providing multi-layered protection:
A. Identifier Renaming
- Replaces meaningful variable names (e.g.,
userPassword), function names (e.g., calculateTotal) with meaningless short characters (e.g., _0x4a2c or a), completely erasing code readability.
B. String Encryption & Escaping
- Base64 Encoding/Hexadecimal Conversion: Extracts plaintext strings from the code (e.g., API URLs, prompt text) into a global array and encrypts them, decrypting them dynamically at runtime to prevent locating code positions via keyword searches.
C. Control Flow Flattening
- Alters the execution order of the code. Transforms originally linear
if-else or switch logic into a complex loop-based dispatch structure, making it difficult for debuggers to trace execution paths.
D. Dead Code Injection
- Randomly inserts "garbage code" that does not affect the execution result, increasing code volume and adding distractions to confuse analysts.
E. Ultimate Compression & Privacy
- Local Processing: All obfuscation operations are performed locally in your browser. Your source code is never uploaded to any server, ensuring 100% security for your commercial secrets during processing.
3. Comparison: Before vs. After Obfuscation
| Code Type |
Example |
Readability |
| Original Code |
function checkLogin(u, p) { if(p === '123') return true; } |
Very High (Clear at a glance) |
| Basic Obfuscation |
function _0x1a(_0x2, _0x3) { if(_0x3 === '123') return !![]; } |
Low (Variable meaning unclear) |
| Advanced Obfuscation |
var _0x5=[...]; (function(_0x1, _0x2){...}(_0x5, 0x1a)); eval(...); |
Very Low (Incomprehensible to humans) |
4. Brief Operation Process
- Paste Source Code: Paste the JavaScript code you want to protect into the left input box.
- Select Configuration: * Default Mode: Quick obfuscation, balancing performance and security.
- Enhanced Mode: Enables control flow flattening and string encryption (suitable for high-security scenarios).
- Click Execute: Click the "Obfuscate Code Now" button.
- Preview & Download Result: The result will be displayed in the right box. You can click "Copy Code" or directly download it as a
.js file.
- Performance Test: It is recommended to run the obfuscated code in your test environment to ensure the logic and functionality remain correct.
5. Why Choose This Site's JS Obfuscation Assistant?
- Low Performance Overhead: The optimized obfuscation engine minimizes impact on execution speed while ensuring protection strength.
- Zero Intrusiveness: Obfuscated code fully complies with ECMAScript standards and is compatible with all major browsers.
- Completely Free: No need to pay for expensive commercial obfuscation software; features rival professional tools.
- User-Friendly Interface: Real-time error alerts. If your source code contains syntax errors, the tool will provide immediate prompts.