Javascript Obfuscator

To help protect your source code from theft, reverse‑engineering, or unauthorised reuse, our online JavaScript Obfuscator transforms your JavaScript into a format that is extremely difficult for humans to read and understand. It does this by applying advanced obfuscation techniques such as renaming variables and functions, altering code structure, and removing meaningful formatting—while preserving the original functionality of your script.

The obfuscation process makes it significantly harder for others to copy, analyse, or modify your code, helping safeguard your intellectual property when deploying JavaScript in public‑facing websites or applications. Although the resulting code may appear complex or unreadable, it will continue to run exactly as intended in all supported environments.

Despite the added protection, the obfuscated JavaScript remains fully valid and executable. You can also convert the code back to a readable format at any time using a JavaScript beautifier, allowing you to debug, update, or maintain your original logic without difficulty. This makes the obfuscator an ideal solution for balancing code security with long‑term maintainability.

JavaScript code

Base62 encode Shrink variables

Obfuscated code

Your code is obfuscated in your browser and nothing is uploaded.

How to use it

The online javascript obfuscator webtool is a simple program that will encode your javascript code.

Add your codePaste your JavaScript into the editor above, or use Open file to load a .js file.
Choose your optionsBase62 encode packs the code into a dictionary-substituted block, which is what makes it hard to read. Shrink variables also renames local variable and function names first.
ObfuscateClick 'Obfuscate Code'. The result still runs exactly the same when it is loaded on a page, it just reads as a wall of short tokens.
Copy or downloadClick Copy to put the obfuscated code on your clipboard, or Download to save it as a .js file. Decode reverses the Base62 packing to check the result.

Good to know

Obfuscation, not encryption

This hides the shape of your code from a casual reader, but anyone can still run it through a formatter or the Decode button to get back readable JavaScript. It does not stop a determined person.

Shrink variables is conservative

It only renames plain function parameters and var locals. Arrow functions, destructured parameters, and any name that is also used as an object property are left as they are, so nothing is ever renamed unsafely.

Keep your original

Obfuscated code is much harder for a person to edit. Keep the source you started with, and run this tool again whenever you change it.

Frequently asked questions

Will the obfuscated code still work?

Yes. Only the text of the code changes: whitespace and comments are removed, local names may be shortened, and the result is wrapped so it rebuilds and runs the original logic when it loads. The behaviour is unchanged.

Does this protect my code completely?

No. Obfuscation makes code harder to read and slower to reverse-engineer, but it is not encryption. Anyone with access to the page can still run Decode, a JavaScript beautifier, or a debugger to see readable code eventually.

Why does it say my code could not be obfuscated?

The tool reads through your code first, and an unusual or unterminated string, comment or template literal can stop it before anything is changed. Your original code is never altered when this happens.

What does Decode do?

It reverses the Base62 packing on code this tool produced, so you can check what the obfuscated code actually contains. It does not recover variable names that Shrink variables replaced.

Is my code uploaded?

No. The obfuscation is done in your browser and nothing is sent anywhere.