ILSpy
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform! observed · 2026-10-17
Health v2 · maintenance only
94/100
- Activity 100
- Release rhythm 84
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-10-21. Adoption (stars, forks) is never an input.
- gap_med: 34.5
- age_days: 5737
- days_rel: 27
- days_push: 4
- n_releases_24m: 13
Adoption not part of the score
26677 stars · 3775 forks observed · 2026-10-17
What it is AI-extracted, prompt v1, taxonomy v1, 2026-10-12, confidence 0.99
ILSpy is an open-source, cross‑platform .NET assembly browser and decompiler. It provides a graphical UI as well as command‑line tools for decompiling assemblies back to C# source.
Use cases
- Decompile .NET DLLs or EXEs to view the original C# source code.
- Inspect third‑party libraries for debugging or security analysis.
- Generate PDB files from stripped binaries to improve debugging experience.
- Explore Unity game assemblies to understand game logic.
- Search for types, methods, or properties across large .NET projects.
- Use the ILSpy command‑line tool in CI pipelines to verify decompilation output.
- Learn IL and C# interop by converting IL back to readable C#.
When to choose
- You need a free, actively maintained decompiler for .NET assemblies.
- Cross‑platform support (Windows, Linux, macOS) is required.
- Both a graphical UI and a CLI are useful for different workflows.
- You want to integrate decompilation into custom .NET tools via the NuGet packages.
When to avoid
- You require commercial support or guaranteed updates for proprietary environments.
- Decompiling heavily obfuscated or protected binaries where ILSpy may fail.
- Performance on extremely large assemblies is a critical factor.
Facets
application · maturity active
parser cli gui programming-languages windows cross-platform cli dotnet dotnet csharp il assembly-browser pdb-generation open-source avalonia decompiler software-development linux macos desktop
1 source
- readme: https://github.com/icsharpcode/ILSpy · fetched 2026-10-17 · 765aa58195b7
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| icsharpcode/ILSpy | main | 94 |
| icsharpcode/AvaloniaILSpy | plugin | 10 |
| icsharpcode/ilspy-vscode | plugin | 81 |
For agents
markdown · JSON · MCP: product_card(name="icsharpcode/ILSpy")
Data as of 2026-10-19T08:05:51.212177+00:00 · Report a problem