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dotPeek vs dnSpyEx: catalog facts
dotPeek	dnSpyEx
	Screenshots
Best for: .NET developers inspecting or debugging assemblies without source code	Best for: Reverse engineers and developers inspecting or debugging .NET programs
Free Free of charge; also included in the paid dotUltimate bundle.	Free Free and open source.
Windows	Windows
Decompiles .NET assemblies to C# or IL Exports decompiled code as a Visual Studio project Can serve symbols to the Visual Studio debugger ReSharper-style navigation and find usages	Decompiler, debugger and assembly editor in one tool Debugs .NET assemblies without their source code Maintained continuation of a widely used tool
Windows only Closed source Limited to .NET assemblies	Unofficial fork of the original project Windows only
Downloadable app	Downloadable app
Not open source	Open source
License: Proprietary	License: GPL-3.0
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for dotPeek jetbrains.com/decompiler Catalog checked October 2, 2026	Official website Full listing and sources Sources for dnSpyEx github.com/dnSpyEx/dnSpy Catalog checked September 24, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.

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