JavaScript Obfuscator: Free Online Code Obfuscation Tool
The JavaScript Obfuscator transforms JavaScript code using Low, Medium, High, or Custom settings. Choose options such as identifier renaming, string array encoding, control-flow flattening, and debug protection, or use a seed for reproducible output. Processing runs in a Web Worker to keep the interface responsive. Obfuscation is not encryption and should not protect secrets.
The JavaScript Obfuscator is a browser-based tool for transforming JavaScript code into obfuscated output. Choose a Low, Medium, High, or Custom preset, then review the available settings to create an output that suits your testing or sharing needs. The tool processes code in a Web Worker, which helps keep the interface responsive while obfuscation runs.
The configurable options include identifier renaming, string array encoding, control-flow flattening, dead-code injection, self-defending, and debug protection. You can also provide a seed for reproducible output. Paste or drop JavaScript into the tool, select your preferred configuration, and review the resulting code. Obfuscation is not encryption, so it should not be used to protect secrets.
JavaScript is a programming language, while obfuscation changes how its code is represented to make it harder to read. Developers may use an obfuscator when preparing code to ship or share, exploring how different settings affect a snippet, or comparing transformed code with its original. Obfuscation does not turn code into a secure container for confidential values.
The JavaScript Obfuscator runs entirely in your browser. Your input is processed on your device and is not uploaded, stored, or sent to a server. Once the page has loaded, the tool works offline without a server dependency, so you can use it without an active connection.
This tool is useful for developers and DevOps engineers who want to try JavaScript obfuscation without integrating it into a build pipeline. Beginners can explore the presets and options, while experienced developers can use a seed to reproduce output and compare configurations.
Step 1: Paste or drop your JavaScript code into the tool. Use the code you want to obfuscate as the input.
Step 2: Choose a preset: Low, Medium, High, or Custom. The preset controls the obfuscation configuration.
Step 3: Review the available options, including identifier renaming, string array encoding, control-flow flattening, dead-code injection, self-defending, and debug protection.
Step 4: Set a seed if you want reproducible output. Using the same seed is intended to make the result reproducible.
Step 5: Run the obfuscation and review the generated JavaScript. Processing uses a Web Worker so the interface stays responsive.
Step 6: Copy the obfuscated output when you are ready. Remember that obfuscation is not encryption and does not make secrets safe to include in code.
Use case: Make JavaScript code harder to read before you ship or share it. Obfuscation can change how code appears without serving as encryption.
Use case: Demo JavaScript obfuscation on a snippet without wiring the tool into a build pipeline. Paste or drop the code to see the result.
Use case: Compare obfuscated output with the original code to inspect what changed. This is useful when evaluating whether a preset fits your needs.
Use case: Compare Low, Medium, High, and Custom configurations on the same JavaScript sample. The presets and options let you explore different obfuscation setups.
Use case: Use a seed when you need reproducible obfuscation output. This can help you compare results while keeping the input and seed consistent.
Use case: Explore features such as identifier renaming, string array encoding, or control-flow flattening on sample code. This gives developers a direct way to review the output of individual obfuscation options.