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dnSpyEx
What it is
dnSpyEx is a free, GPLv3-licensed debugger and .NET assembly editor for working with assemblies when source code is unavailable. It can debug .NET Framework, .NET, and Unity game assemblies using breakpoints, tracepoints, conditional and exception breakpoints, and multiple-process debugging. Editing tools cover metadata and methods or classes in C# and Visual Basic, as well as low-level IL method bodies. C# and Visual Basic decompilers use the ILSpy engine; the project also lists BAML decompilation and disassembly. Assembly search and analysis tools can locate class and method usage and callers, while bookmarks and project export help organize work. A public API supports extensions, and a C# Interactive window can control or script the app. The releases page lists v6.6.0 as the latest stable release, with a .NET 10 distribution. Its notes discuss Wine compatibility adjustments for Linux use, not native Linux support. Dynamic methods cannot be debugged because of CLR limitations. Unity game debugging also requires the dnSpyEx Unity Mono repository.
For and against
For
- Debugs .NET Framework, .NET, and Unity game assemblies.
- Edits C#, Visual Basic, and IL methods.
- Includes C# and Visual Basic decompilers.
- Supports conditional and exception breakpoints.
- Free and licensed under GPLv3.
Against
- Dynamic methods cannot be debugged.
- Linux use is via Wine; native Linux support is not described.
- Unity debugging requires the separate Unity Mono repository.
The verdict
dnSpyEx brings debugging, assembly editing, decompilation, and analysis into one tool for .NET work. Linux users should note the Wine-based support described in the release notes, and dynamic methods are outside its debugging capability.
Who it suits
dnSpyEx suits developers who need to inspect, edit, decompile, or debug .NET assemblies without source code. It may also fit users working with Unity game assemblies, provided they use the additional Unity Mono repository.
Plans and prices
dnSpyEx
GPLv3-licensed · Latest stable release and beta builds available
Read 4 Oct 2026 · github.com
On the record
- Analysis tools
- Features include searching assemblies, analyzing class and method usage, finding callers, bookmarks, and exporting to a project.github.com · read 4 Oct 2026
- Assembly editing
- It supports editing metadata and methods or classes in C# and Visual Basic, as well as low-level IL method-body editing.github.com · read 4 Oct 2026
- Current release
- The releases page lists v6.6.0 as the latest stable release and says the release adds a .NET 10 distribution.github.com · read 4 Oct 2026
- Debugging
- It can debug .NET Framework, .NET, and Unity game assemblies, with breakpoints, tracepoints, conditional breakpoints, and multiple-process debugging.github.com · read 4 Oct 2026
- Decompilation
- The project lists C# and Visual Basic decompilers using the ILSpy decompiler engine, plus a BAML decompiler and disassembler.github.com · read 4 Oct 2026
- Integrations
- To debug Unity games, the project says the dnSpyEx Unity Mono repository is also needed.github.com · read 4 Oct 2026
- License
- The repository states that dnSpy is licensed under GPLv3.github.com · read 4 Oct 2026
- Limits
- The project notes that dynamic methods cannot be debugged because of CLR limitations.github.com · read 4 Oct 2026
- Maintainer support
- The v6.6.0 release notes direct users of third-party extensions to their extension developers for help with extension issues.github.com · read 4 Oct 2026
- Platform support
- The v6.6.0 notes describe Windows 11 Snap Layout support and Wine compatibility adjustments for running dnSpy on Linux; they do not describe native Linux support.github.com · read 4 Oct 2026
- Purpose
- dnSpyEx is an unofficial continuation of dnSpy, a debugger and .NET assembly editor for working with assemblies without source code.github.com · read 4 Oct 2026
- Scripting and extensions
- A public API supports extensions, and the C# Interactive window can be used to control or script dnSpy.github.com · read 4 Oct 2026
- Security and integrity
- The v6.6.0 release lists SHA-256 hashes for its ZIP distributions and says the release commit was signed with a verified committer signature.github.com · read 4 Oct 2026
