JSVeil: Robust JavaScript Obfuscation & VM Protection

Source Code Input

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Protected Code

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Obfuscation Settings

Protection Layers

Pre-obfuscation

VM (Virtual Machine) Protection

Frequently Asked Questions

What is JavaScript Obfuscation?

JavaScript obfuscation is a security technique that transforms human-readable source code into a version that is functionally identical but extremely difficult to read and reverse-engineer. This process acts as a powerful deterrent against code theft, tampering, and intellectual property infringement.

Why should I use JSVeil?

JSVeil offers a simple yet powerful solution for protecting your JavaScript code. We employ multiple layers of advanced protection, including VM obfuscation, to ensure your code stays secure from reverse engineering and theft.

How does JSVeil compare to other obfuscators like obfuscator.io?

While standard obfuscators focus on traditional techniques like control flow flattening, strings transformations, dead code injection, etc., JSVeil goes a significant step further by implementing Virtual Machine (VM) protection. We convert your JavaScript code into custom bytecode executed within a lightweight, secure virtual machine. This multi-layered approach provides a much higher level of security for your critical code by making reverse-engineering significantly more difficult.

What do the protection layers do?

Pre-obfuscation: This optional layer, enabled by default, applies traditional obfuscation techniques (e.g., string transformations, control flow flattening, dead code injection) to the code before it gets converted into bytecode by the VM. This adds an extra layer of complexity to thwart analysis. If you encounter any compatibility issues, we recommend disabling this option.

VM (Virtual Machine) Protection: Our core security feature, always enabled, converts your JavaScript into custom, secure bytecode executed by a lightweight, embedded virtual machine. This process makes it extremely difficult to reverse-engineer or understand the original code's logic, providing robust protection against theft and analysis.

Does obfuscation impact performance?

While any code transformation can introduce minor overhead, JSVeil is highly optimized to minimize performance impact.

Are there any limitations?

Yes, the free version of JSVeil is limited to processing a single JavaScript file up to 5KB in size.