ILSpy
ILSpy: A capable free .NET decompiler with broad tooling, but no verified debugging. Ranked #11 of 24 in Decompiler Software by our editors (7.6/10); pricing: Free plan; best for free cross-platform .NET decompilation.
At a glance
- Editor score7.6 / 10
- PricingFree plan
- Best forFree cross-platform .NET decompilation
- Free planYes
- Paid fromFree
- Native-code decompilationNo
- Facts checked20 Sep 2026
Where it wins
- Decompiles C# and supports whole-project workflows
- Runs across Windows, macOS, and Linux
- Adds metadata, search, plugins, CLI, and PowerShell tools
Where it doesn't
- Does not target native code
- Verified debugging is absent
- Prebuilt binaries may vary by platform
Our verdict on ILSpy
ILSpy is an open-source .NET assembly browser and decompiler for developers, analysts, and maintainers who need to inspect .NET assemblies across Windows, macOS, or Linux. Its core workflow covers C# decompilation, whole-project decompilation, assembly metadata browsing, and searches across types, methods, and properties. The project also provides command-line, PowerShell, Visual Studio, and Visual Studio Code frontends, giving it value beyond a desktop-only viewer.
Its feature depth is strongest in .NET inspection. BAML-to-XAML decompilation and ReadyToRun binary support extend coverage for assemblies that need more specialized handling, while command-line navigation and search support scripted workflows. The PowerShell module adds another automation route, and plugin extensibility allows the tool to be extended. Visual Studio and Visual Studio Code integrations also make it easier to fit assembly inspection into existing development environments. There are no AI features, and native-code decompilation is outside its stated scope.
ILSpy is a strong choice for users who want a free, open-source tool for cross-platform .NET decompilation, metadata exploration, project-wide review, and scripting. Its free license and multiple interfaces make it suitable for individual investigation and development workflows without a paid tier structure. Choose an alternative if verified debugging is essential, if native-code analysis is required, or if a consistent prebuilt binary experience is a priority across every platform. For focused .NET assembly work, ILSpy combines broad inspection features with desktop, editor, command-line, and PowerShell access.
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ILSpy pricing
ILSpy fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Native-code decompilation | No |
| Bytecode decompilation | Yes |
| Debugger integration | Not verified |
| Scripting API | Yes |
| Plugin support | Yes |
| License type | Free |
| Deployment | Desktop |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Solo, Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 3 integrations: Visual Studio, Visual Studio Code, PowerShell |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
ILSpy integrations
ILSpy lists 3 integrations on its own site.
- Visual Studio
- Visual Studio Code
- PowerShell
Alternatives to ILSpy
- GhidraA free, broad toolkit for native-code, Java, and DEX analysis.9.4
- Binary NinjaA broad native reverse-engineering toolkit with perpetual paid licenses and a free plan.9.2
- IDA ProA deep native reverse-engineering suite for teams that need broad architecture support.9.0
Also Ranked In
ILSpy is ranked in 2 of our directories.
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Featured on iTechGuides
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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