FreeJsObfuscator.com - Key Features & How It Works

🛠 Key Features of FreeJsObfuscator – FreeJavascript Obfuscator

·         100% Free & No Limits

o   No registration or subscription required.

o   Unlimited usage with no hidden fees or watermarks.

·         Browser Based Obfuscation

o   All transformation happens locally within your browser—no code is sent to any server. Your source code stays private and secure.

o   Does not use eval(), avoiding associated security pitfalls.

·         Up to Date Language Support

o   Version 3.26 released June 29, 2025, fully supporting modern JavaScript.

o   Support for classes since v3.0 (as of December 5, 2024).

o   Supports deeply nested template literals and tagged templates since v3.17 (May 5, 2025).

·         Customizable Obfuscation Settings

o   Options include:

§  Removing whitespace.

§  Prefixing variable/function/parameter names with random or custom prefixes.

§  Encoding string literals into hex, Unicode, or split expressions

§  Number transformations into binary, octal, hex, or symbolic form.

§  Exclude functions, globals, classes, class members from renaming.

·         Code Wrapping / Encapsulation Options

o   As of v3.14 (March 10, 2025), you can wrap the output code in:

§  No wrapper option.

§  An Immediately-Invoked Function Expression (IIFE)

§  Or a named function, which you can call later manually.

 

⚠️ Usage Notes & Considerations

·         Your JavaScript must be valid syntax — missing semicolons or invalid code often causes obfuscation to fail (error in ~97% due to missing ;) .

·         Supports code up to ~8,200 characters in one go; very long strings should be split across concatenated literals.

·         Obfuscation is one-way; you should retain a copy of your original code for edits or debugging.

·         This tool is meant to increase resistance to reverse-engineering, but not to guarantee complete protection—determined engineers may still deobfuscate advanced code.

 

 

✅ How It Works (Quick Workflow)

1.       Paste your valid JavaScript code into the input panel.

2.       Adjust obfuscation options (prefix styles, encoding choices, wrapper mode, exclusions).

3.       Click Obfuscate.

4.       Copy the transformed code from the output box and integrate it into your deployment.

  

📝 Summary

FreeJsObfuscator.com is a lightweight, browser only tool designed to help developers protect JavaScript code without cost orfriction—supporting modern ES features and flexible customization settings. It’s ideal for front-end logic you want to hide or compress before deployment.