ILSpy for Mac

Product Snapshot

ILSpy is a free, open-source decompilation tool for .NET assemblies that runs on macOS. Implemented using the Avalonia UI framework, it offers a modern graphical interface that makes it straightforward to inspect compiled .NET binaries without needing the original source files. Developers and analysts commonly use it to explore how applications work internally or to track down bugs in third-party components.

Main Capabilities

• Built-in debugging utilities to step through decompiled code and inspect runtime behavior
• Inline editing and lightweight code modification inside the viewer
• Fast, hierarchical navigation through assemblies, namespaces, types, and members

Who Benefits Most

This utility is helpful for software engineers performing diagnostics, security researchers analyzing binaries, and learners who want to study implementation details of .NET libraries. It’s particularly valuable when source repositories are unavailable or when you need to verify what compiled code actually does.

License, Cost, and Alternatives

ILSpy is distributed under an open-source license and is available at no charge. If you’re exploring other options, consider lightweight reference tools such as CheatSheet (free), which can serve as a quick lookup or companion resource when inspecting assemblies.