JavaScript Obfuscator

JavaScript Obfuscator

Use this free online JavaScript obfuscator to obfuscate your JavaScript source code and prevent it from being stolen, copied, or reused without your consent. With the help of this tool, your original JavaScript source code is transformed into a new encoded version that is very difficult to understand, copy, reuse, and modify without permission.

Created by Commontools | Updated on: April 07, 2023


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Have you ever been concerned about your original JavaScript source code being copied, re-used, or modified without your permission? Well, worry no more because we have the perfect solution for you! Our cutting-edge tool will transform your source code into a new representation virtually impossible to understand or manipulate without proper authorization. This process is known as obfuscation, and the end result will have the exact same functionality as your original code. 

In other words, your code will be just as powerful, but now it will be safeguarded against unauthorized access or misuse. Trust us, your code deserves the best protection possible, and our obfuscation tool is the perfect way to achieve it.

Now, let's first understand what Javascript Obfuscator is.

What is Javascript Obfuscator?

The tool alters your initial JavaScript source code to create a novel representation that is more challenging to comprehend, replicate, repurpose, or revise without proper consent. The obscured outcome retains the same functionality as the original code.

Key points

  • Code obfuscation makes it more challenging for attackers to inspect and analyze the code, providing an additional layer of security in untrustworthy environments.
  • Obfuscated code has no loopholes for debugging, manipulating, or disseminating for illicit benefit, making it essential for apps that deal with business-critical consumer personal information.
  • Obfuscators also clean up the code by deleting unnecessary metadata, dead codes, and duplicates, leading to faster code execution and better performance.
  • Code obfuscation makes it difficult to reverse-engineer a program, making code distribution on open-source platforms less of a concern.
  • Iterative code obfuscation, where one or more obfuscation algorithms are used in this technique, confuses attackers about the program's original goal and makes deobfuscation attempts fail.
  • Cracking an obfuscated code demands effort, talent, money, and time, making code obfuscation a practical approach to dealing with threats and weeding out fun-attackers.
  • Even if hackers succeed, the deobfuscated code may not resemble the original code very closely.
  • Most companies obfuscate code for security and privacy, though true effectiveness measures are difficult.

Now as you understand what Javascript Obfuscator is all about. Let's deep dive into why we need to Obfuscate JavaScript Code.

Why Obfuscate JavaScript Code?

JavaScript has emerged as a dominant programming language for the web and is utilized by almost every website today. With the advent of cross-platform frameworks like React Native and Ionic, developers can now use a shared JS codebase to build mobile and desktop apps, cementing JavaScript's position as a key player in software development.

JavaScript is integral to numerous industries, such as mobile banking, e-commerce, and streaming services, and is used by all Fortune 500 companies for app development. Client-side JavaScript code is interpreted in the browser, allowing anyone to read or modify the code using a browser debugger easily. As a result, client-side JavaScript is highly susceptible to security breaches, making it imperative to obfuscate the code to safeguard businesses and their users.

Enterprises and Fortune 500 companies often store vital business logic on the client side of their apps. Although code secrets should ideally be kept on a trusted backend server, sometimes storing important logic on the client side is necessary for improved performance or when the server side is not feasible. However, this exposes a company's proprietary logic to potential intellectual property theft, leading to a loss of business value.

Client-side JavaScript is vulnerable to sophisticated attacks, including automated abuse, piracy, cheating, and data exfiltration. To mitigate such risks, information security standards like ISO 27001 and OWASP recommend using obfuscation tools to prevent effective reverse engineering.

In short, in today's world of software development, obfuscating JavaScript code has become an essential practice. The vulnerability of client-side JavaScript code makes it crucial for businesses to protect their proprietary logic and code secrets from attackers. By employing obfuscation tools, businesses can ensure that their client-side JavaScript code remains secure and protected.

How to use our Javascript Obfuscator Online Tool

Here are steps to use our JavaScript obfuscator :

  1. Open the JavaScript obfuscator online tool in your web browser.
  2. Locate the "Input" textarea on the tool's user interface.
  3. Paste your JavaScript code into the "Input" textarea. Alternatively, you can click the "Upload" button to select a JavaScript file from your computer to obfuscate.
  4. Click the "Obfuscate" button to run the obfuscation process on your JavaScript code.
  5. The obfuscated code will be displayed in the "Output" textarea.
  6. If you want to clear the input and output textareas, click the "Clear" button.
  7. To copy the obfuscated code to your clipboard, click the "Copy" button.

That's it!


Why would you want to obfuscate your JavaScript code? 

You may want to protect your code for several reasons, including preventing others from copying and pasting your work, especially in 100% client-side projects like HTML5 games. Obfuscation can also remove unnecessary comments and whitespace, making your code faster to load and harder to understand. Additionally, obfuscation protects your work from being used without payment by showing your work to the client without providing the source code until the invoice is paid.

Do we store your source code? 

No, the source code is only processed by our application server, then the obfuscator, and back to the browser. It stays on our server memory for a brief period (usually milliseconds).

Can you recover the original source code from the obfuscated one? 

No, it's impossible to revert the obfuscated code back to the original. Therefore, it's essential to keep the original code safe.

Is this obfuscator foolproof? 

Unfortunately, no. While recovering the original source code is impossible, someone with the time, knowledge, and patience can reverse-engineer it. Since JavaScript runs on the browser, the browser's JavaScript engine must read and interpret it, making it impossible to prevent this. Any tool that promises otherwise is not being truthful.

Why is obfuscated code larger than the original source? 

The obfuscator introduces new pieces of code to protect and defend against debugging and reverse engineering. Additionally, strings are converted to \xAB hexadecimal code, making it harder to understand. While this may increase code size, you don't have to worry too much because there is a lot of repetition. As a result, the obfuscated code will compress extremely well by your webserver (assuming GZIP compression is enabled, which most servers support nowadays).

Can you run a minifier like UglifyJS or Google Closure Compiler on the obfuscated output? 

It's not recommended, and in some cases, it can break the code, especially if you enable self-defending. However, you can run your code through a minifier before obfuscation to remove dead code and perform other optimizations.


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MLA Style Citation

"JavaScript Obfuscator.", 2024. Thu. 13 Jun. 2024. <>.

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