System Requirements
User Interface
The Main Menu
The Main Panel
The Tasks Panel
GUI Elements
Addtional Files
Additional License Information
License File Settings
License Manager
Main Assembly
Master Key
Licensing System
Understanding The License System
How Locks Work
General Information
Anti Tampering
Compress & Encrypt Resources
Control Flow Obfuscation
Embed Assemblies
License File
Mapping File
Merge Assemblies
Native EXE File
Pre-JIT Methods
String Encryption
License Examiner Tool
License Invalidation Tool
License Reactivation Tool
Stack Trace Deobfuscator
Library - Test Environment
Protect An Assembly
Lock An Assembly
Unlock An Locked Assembly
Register Online
License Agreement
Why register?
Support and Contact
Technical Support
Command Line Parameters

.NET Reactor Online Help

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Key Features

Application, Library and
Windows Service
Whatever your .NET product, .NET Reactor protects it.
Windows Windows Forms Applications, Console Applications, Windows Services, Control & Class Libraries, WPF Applications & Libraries, WinRT/Metro Applications & Libraries
Web ASP.NET Applications & Libraries, ASP.NET Services, WCF Services, Sharepoint WebParts
Silverlight Silverlight Applications & Libraries
Smart Device Windows Phone and Compact Framework Applications & Libraries
Others SQL Server CLR Assemblies, Mono Applications & Libraries

.NET Reactor offers full protection support for your ASP.NET Applications and Libraries.

.NET Reactor supports all .NET Framework implementations, including Compact Framework, Silverlight and Mono:
.NET Reactor supports all .NET Framework implementations, including Compact Framework, Silverlight and Mono:
NET Framework 1.1/2.0/3.0/3.5/4.x
.NET CF 1.1/2.0/3.5
Windows Phone 7/8/10
.NET Portable
.NET Core 1.0-2.2
.NET Standard 1.0-2.0
Unity 3D
Universal Windows
Silverlight 2.0/3.0/4.0/5.0
Mono 1.x/2.x

.NET Reactor can merge or embed multiple .NET files into one executable(.exe) or library(.dll).

.NET Reactor is able to compress applications and embedded files up to 50-75%.

NecroBit IL Code Protection
NecroBit is a powerful protection technology which stops decompilation. NecroBit replaces the CIL code within methods with encrypted code. This way it is not possible to decompile/reverse engineer your method source code.

Anti ILDASM / Anti Decompiler
No tool can disassemble/decompile .NET Reactor protected code. ILDASM(the Microsoft Intermediate Language disassembler) will actually report that it cannot interpret .NET Reactor protected assemblies.

Native EXE File
.NET Reactor is able to generate a native x86 EXE file stub for your application. This way it is not possible to directly open your protected application in a decompiler. The decompiler recognizes your protected application as a native EXE file.

Pre-JIT Methods
In combination with the Native EXE File feature and NecroBit, .NET Reactor is able to convert managed methods into REAL x86 native code. Only methods which doesn't affect the runtime and platform behavior (mostly small methods like property getters/setters...) are converted into native code. By nature this feature has an built-in protection against assembly modification.

In addition to source protection, .NET Reactor provides thorough class and member obfuscation complemented by different exclusion schemes, use of non-printable characters in obfuscated names, and even incremental obfuscation, which always generates the same obfuscation strings for type and member names.

Declarative Obfuscation
Declarative Obfuscation support allows you to directly define which types and members should be excluded from obfuscation. This can be done by using the custom attribute System.Reflection.ObfuscationAttribute in your source code. .NET Reactor automatically detects the attribute and excludes the corresponding types and members from obfuscation.

Control Flow Obfuscation
Control Flow Obfuscation converts the code inside your methods into spaghetti code, which whilst retaining the function of the code makes it extremely difficult for human eyes and decompilers to follow the program logic. Decompilers are not able to decompile the spaghetti code back to your original source code.

String Encryption
String encryption makes it difficult for a hacker to understand your code and to attempt a code patch of your assembly, as he will be unable to identify the text of messages or other useful strings, making it much more difficult to identify where to patch your code. This feature has a built-in protection against assembly manipulation.

Strong Name Removal Protection
Strong Name Removal Protection prevents your protected assembly from being tampered by hacker tools as they are not able to correctly resign the assembly with a different stong name.

Resource Encryption and Compression
.NET Reactor can improve protection and assembly size by compressing and encrypting your managed resources. At runtime, when required the resources are automatically decompressed and decrypted.

Powerful Licensing System
Powerful  and flexible, the .NET Reactor licensing features allow you to enforce your license conditions and protect your revenue stream by using hardware and software locks. The license manager can build trial or permanent licenses, in a matter of seconds. A fully documented software development kit (SDK), complete with examples, allows you to call the licensing system directly from your code, allowing you to create custom extensions to the licensing system.

Third Party Support
.NET Reactor is a mature product which has attracted third party development of add-ons.

Full Language Support
.NET Reactor supports all types of managed assemblies (C#, VB.NET, C++.NET, ASP.NET, Delphi.NET, J#...).

Intuitive GUI
An intuitive, easy-to-operate GUI provides quick, comfortable operation.

Command Line Support
All features support command line invocation, and event driven invocation by Visual Studio Build Events. .NET Reactor produces the finished product in the same way you do.

Fairly priced
Everyone needs .NET Reactor, and .NET Reactor is priced to make ownership affordable — Compare with other products and features

We trust our product. .NET Reactor is protected by itself.

Further Tools / Features
Further tools and features include a Standalone License Generation Tool, Multi Assembly Protection, Strong Name Support or Digital Certificate Support.

Supported Platforms : Windows 98, Windows ME, Windows NT, Windows 2000, Windows XP, Windows Server 2003/2008/2012, Windows Vista, Windows 7, Windows 8/8.1, Windows 10
Supported Platforms (Mono) : Linux - SUSE, Novell, Red Hat, Mac - OS X, Solaris, BSD - OpenBSD, FreeBSD, NetBSD
Supported Platforms (Xamarin): Android, Apple iOS