About ILSpy
The open-source .NET assembly browser and decompiler.
ILSpy is a popular pick in the developer space, trusted by people who want results without the clutter. Expect decompile to c# and browse assemblies plus a light footprint that respects your machine.
Get ILSpy for Windows now: the current version, a clean installer and a fast, direct download.
Key features
- ✓Decompile to C#
- ✓Browse assemblies
- ✓IL view
- ✓Open source
Requirements
Windows 10 / 11, 64-bit
ILSpy — frequently asked questions
Is ILSpy free to download?+
Yes. ILSpy is free and open source, so you can use it at no cost.
Is ILSpy safe to download?+
Yes. HivApps links to the latest ILSpy build and keeps listings clean, with no bundled extras. As always, keep your antivirus on and only install software you trust.
What is the latest version of ILSpy?+
The latest version listed here is ILSpy 9.0, updated Sep 3, 2026.
What do I need to run ILSpy?+
Windows 10 / 11, 64-bit
How do I install ILSpy on Windows?+
Click the Download button on this page, run the installer once it finishes downloading, and follow the on-screen setup steps.
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Latest version (9.0) · Safe & clean