Javascript Obfuscator
JavaScript Obfuscator protects browser and Node.js code against reverse engineering and tampering. Use the free online tool, the Windows desktop app, or the javascriptobfuscator-com npm package in builds and CI, with plugins for webpack, Vite, Rollup, esbuild, Next.js and Metro. Protection includes identifier renaming, string encoding and encryption, control-flow flattening, dead-code insertion, member protection, domain and date locking, self-defending output, debugger friction, and VM bytecode protection for marked functions. Teams that cannot send source to a third party can protect locally in the desktop app. Releases can be verified with Ed25519-signed attestations and opt-in reproducible builds. Migrating from javascript-obfuscator or JS-Confuser takes one command: the CLI converts your existing configuration. Free tier available; paid plans from $29/month.
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jsObf
jsObf is a powerful, web-based JavaScript encryption and obfuscation tool that enables users to transform readable JavaScript code into obfuscated, secure versions via direct input or file uploads (up to 5 MB). It also serves developers through its API, offering two endpoints, one for raw code and another for file uploads, with configurable output formats (JSON or XML) and adjustable complexity levels. It simplifies protection workflows with intuitive, drag-and-drop interfaces and backend API support, empowering users to quickly mask logic, thwart reverse engineering, and secure proprietary scripts without complex setup or tooling.
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BlueClosure
BlueClosure can analyse any codebase written with JavaScript frameworks like Angular.js, jQuery, Meteor.js, React.js and many more. Realtime Dynamic Data Tainting. BlueClosure Detect uses an advanced Javascript Instrumentation engine to understand the code. By leveraging our proprietary technology the BC engine can inspect any code, no matter how obfuscated it is. Scanning Automation. BlueClosure technology can automatically scan an entire website. This is the fastest way to scan and analyse BIG enterprise portals with rich Javascript content as a tester would with his browser. Near-Zero False Positives. Data Validation and Context Awareness makes the use of a dynamic runtime tainting model on strings even more powerful, as it understands if a client side vulnerability is actually exploitable.
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JS-Confuser
JS-Confuser is a powerful, open source JavaScript obfuscation tool that transforms your source code into a highly unreadable form, deterring reverse engineering, tampering, and unauthorized reuse while preserving full functionality. It offers multiple obfuscation techniques, including variable renaming, control flow flattening, string concealing, and function obfuscation, along with locks such as domain-based or date-based execution constraints and integrity checks to detect runtime modifications. Designed for flexibility, it provides obfuscation presets, ranging from 10 to 21+ transformation layers, and also allows fully customizable configurations to suit performance and protection needs. The tool operates entirely in the browser for fast, private obfuscation workflows, and includes advanced tooling features such as a playground for interactive experimentation, customizable options via JavaScript, integrated code prettification, and debugging support.
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