Awesome and powerful debugger and .NET assembly editor for PC


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  -  81.8 MB  -  Open Source
  • Latest Version

    dnSpy 6.1.8 (64-bit) LATEST

  • Review by

    Daniel Leblanc

  • Operating System

    Windows 7 64 / Windows 8 64 / Windows 10 64

  • User Rating

    Click to vote
  • Author / Product

    dnSpy Team / External Link

  • Filename

dnSpy is a powerful and versatile open-source tool .NET debugger and assembly editor that allows users to reverse engineer .NET assemblies, debug applications, and edit compiled code. Developed by the project community, this tool is widely used by software developers, security researchers, and enthusiasts for various purposes, including analyzing malware, understanding software behavior, and modifying applications for debugging or customization.

If you have any experience developing software, then you know the importance of decompiling assemblies to better learn about their functionality. With that being said, you need the right tools to do this, or else you will fail. There are several software solutions available that give you fast and efficient results, including dnSpy for PC.

Setup is Not Needed

The tool is portable. For this reason, you don’t need to install the software onto a computer or anything like that. The archive just needs to be unpacked and then the executable file must be launched. After that, you’ll be able to take advantage of all the functions.

In addition, the tool can be executed from a USB flash drive, external hard drive, or any other type of removable storage device. Your system’s registry entries won’t be modified either and additional folders and files won’t be generated on the system unless you give permission for that to happen.

Complete User Interface

It features a complete user interface that is stylish and allows you to execute numerous functions. The main window contains standard-looking menus where the function options are organized simply.

Furthermore, the configuration window lets you manage the settings of many different components, including the hex editor, decompiler, display parameters, miscellaneous parameters, and debugger.

.NET Disassembler

It offers you several tools for decompiling .NET assemblies. Some of these tools include a hex editor, assembly editor, debugger, and decompiler. They let you efficiently manage the assemblies.

The Assembly Explorer panel can be found in the main window. The appropriate assembly can be seen in a tree view from here. If you want to open the assembly, use the GAC option to select “Open” or simply indicate the necessary file for it. The GAC is the Global Assembly Cache which has all the available entries listed there.

.NET Assembly Reverse Engineering Tool w/ Reliability

.NET assemblies can be effectively reverse engineered with dn Spy because of its wide variety of handy tools. Some of these tools include a debugger, a decompiler, and an assembly editor. You don’t need to install the tool either. Once you start using it, the interface is easy to navigate and choose the necessary options and settings.

Main Features
  • Decompilation: It enables users to decompile .NET assemblies into C#, Visual Basic, or IL code for analysis and modification.
  • Debugging: It provides advanced debugging capabilities, allowing users to attach to and debug running .NET processes, inspect variables, set breakpoints, and step through code.
  • Assembly Editing: Users can modify compiled assemblies directly within the tool, including modifying IL instructions, adding or removing methods, and altering metadata.
  • Cross-Platform: The app is cross-platform and runs on Windows, macOS, and Linux, ensuring compatibility across different operating systems.
  • Plugin Support: It supports plugins, allowing users to extend its functionality through custom plugins or by utilizing existing ones.
User Interface

The program features a clean and intuitive user interface, with a layout familiar to users of popular integrated development environments (IDEs). The main window consists of several panels for viewing assembly structure, IL code, decompiled code, debugger output, and more. The interface is customizable, allowing users to adjust panels and toolbars according to their preferences.

Installation and Setup

Installing this software is straightforward. Users can download the latest release from the official GitHub repository, FileHorse or use package managers on supported platforms. The setup process typically involves downloading the executable file and running it to launch the app. No additional installation steps are required, making it easy to get started.

How to Use
  • Opening Assemblies: Launch and use the "File" menu to open .NET assemblies for analysis.
  • Decompilation: Navigate through the assembly structure and select classes or methods to decompile into readable code.
  • Debugging: Attach to a running process or open an executable for debugging. Set breakpoints, step through code, and inspect variables as needed.
  • Editing Assemblies: Make modifications to decompiled code or compiled assemblies directly within the tool. Save changes if necessary.
  • Plugins: Explore available plugins or develop custom plugins to extend dnSpy's functionality according to specific requirements.

Is dnSpy for Windows legal to use?
Yes, the tool is legal to use for legitimate purposes such as debugging, reverse engineering, and software analysis. However, users should adhere to relevant laws and regulations in their jurisdictions.

Can dnSpy be used to crack software or bypass licensing mechanisms?
While the app can be used to analyze and modify software, it should not be used for illegal activities such as software piracy or circumventing licensing mechanisms.

Does dnSpy support obfuscated assemblies?
It can decompile and analyze obfuscated assemblies to some extent, but the readability of decompiled code may vary depending on the complexity of the obfuscation techniques used.

Is dnSpy suitable for beginners?
While the program offers powerful features, it may have a learning curve for beginners, particularly those unfamiliar with .NET development and debugging concepts. However, resources such as documentation and online tutorials can help users get started.


ILSpy: Another popular .NET assembly browser and decompiler.

Reflector: A paid .NET decompiler with advanced features for assembly analysis.


The tool is available free of charge as an open-source software under the MIT License. Users can download and use it without any cost.

System Requirements
  • Operating System: Windows 11, 10, 8 and 7
  • Processor: 1 GHz or faster
  • RAM: 512 MB minimum
  • Disk Space: 110 MB for installation
  • Powerful decompilation and debugging capabilities
  • Open-source and free to use
  • Cross-platform compatibility
  • Active community support
  • Customizable interface
  • Lack of official support and updates
  • Steeper learning curve for beginners
  • Limited support for obfuscated assemblies
  • Occasional stability issues with newer releases
Note: Requires .NET Framework.

  • dnSpy 6.1.8 (64-bit) Screenshots

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