JSDefender

JSDefender

PreEmptive
JavaScript Obfuscator Pro

JavaScript Obfuscator Pro

JavaScript Obfuscator
+

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About

Cutting-edge JavaScript obfuscation techniques with control-flow flattening, tamper detection and other in-app protection transforms. We would not send our own unprotected code to a remote service controlled by third parties and we would not expect you to either. JSDefender supports major JavaScript frameworks, runtimes, and bundlers including Angular, Node, React, React Native, Webpack and others. Unlike languages like .NET and Java that are compiled to intermediate, stack-based assembly instructions before being distributed in binary form, JavaScript apps are typically distributed in source form. This means that your code is directly visible to anyone with access to the execution environment (like a browser). So, potential attackers can very easily step through the running code using a debugger built into their browser, or use other tools to statically analyze the code for vulnerabilities.

About

JavaScript Obfuscator Pro is an advanced code protection platform designed to secure JavaScript against reverse engineering and intellectual property theft. Its flagship VM obfuscation feature transforms readable JavaScript into custom bytecode executed by a proprietary virtual machine. This approach removes standard JavaScript structures entirely, making static analysis and decompilation extremely difficult. Each obfuscation run generates unique bytecode and a custom VM, ensuring no reusable deobfuscation patterns exist. JavaScript Obfuscator Pro supports layered security by combining VM obfuscation with additional protection techniques. The platform works through a simple web interface or API, allowing developers to protect code in just a few steps. JavaScript Obfuscator Pro is built for scenarios where maximum code secrecy is required.

About

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.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

IT teams in need of a professional-grade Application Protection solution

Audience

JavaScript Obfuscator Pro is ideal for developers, SaaS companies, and software vendors who need maximum protection for proprietary JavaScript logic against reverse engineering and code theft

Audience

Developers and teams needing a tool to secure their JavaScript by easily transforming it into compressed, obfuscated code that deters tampering and unauthorized reuse

Support

Phone Support Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

API

Offers API Supported

Screenshots and Videos

Screenshots and Videos

No images available

Screenshots and Videos

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Supported

Pricing

Free
Free tier; Basic $29/month; Corporate $49/month; Enterprise $99/month
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Supported
In Person Not Supported

Training

Documentation Not Supported
Webinars Not Supported
Live Online Not Supported
In Person Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

PreEmptive
Founded: 1996
United States
www.preemptive.com/products/jsdefender/

Company Information

JavaScript Obfuscator
United Arab Emirates
obfuscator.io

Company Information

Javascript Obfuscator
Founded: 2004
United States
javascriptobfuscator.com

Alternatives

Jscrambler

Jscrambler

4.4 out of 5 stars

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JSDefender

JSDefender

PreEmptive

Categories

Categories

Categories

Integrations

Angular Supported
C# Not Supported
HTML Not Supported
JSON Not Supported
JavaScript Supported
Node.js Supported
PHP Not Supported
React Supported
React Native Supported

Integrations

Angular Not Supported
C# Not Supported
HTML Not Supported
JSON Not Supported
JavaScript Not Supported
Node.js Not Supported
PHP Not Supported
React Not Supported
React Native Not Supported

Integrations

Angular Not Supported
C# Supported
HTML Supported
JSON Supported
JavaScript Supported
Node.js Not Supported
PHP Supported
React Not Supported
React Native Not Supported
Claim JSDefender and update features and information
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