ILSpy Alternatives for Windows

There are many alternatives to ILSpy for Windows if you are looking for a replacement. The best Windows alternative is dnSpy, which is both free and Open Source. If that doesn't suit you, our users have ranked eight alternatives to ILSpy and eight of them are available for Windows so hopefully you can find a suitable replacement. Other interesting Windows alternatives to ILSpy are dnSpyEx, dotPeek, .NET Reflector and Explorer Suite.

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ILSpy alternatives page was last updated Jun 18, 2025

dnSpy
20 likes
dnSpy is a debugger and .NET assembly editor. You can use it to edit and debug assemblies even if you don't have any source code available.
11 dnSpy alternatives
Cost / License
Free
Open Source
Application type
Decompiler
Alerts
Discontinued
Platforms
Windows
+3
Is dnSpy a good alternative to ILSpy?

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1comment
dnSpy vs ILSpy Comments

Guest
Positive commentOct 26, 2018
-1
Fully featured, allows quick export to VS project, decompiles working code, handles private implementations correctly unlike dotPeek.
Review by a new / low-activity user.
dnSpy is Free and Open SourceILSpy is also Free and Open Source
dnSpyEx
4 likes
dnSpyEx is an unofficial continuation of the dnSpy project which is a debugger and .NET assembly editor. You can use it to edit and debug assemblies even if you don't have any source code available. Main features:
Cost / License
Free
Open Source (GPL-3.0)
Application type
Decompiler
Platforms
Windows
Is dnSpyEx a good alternative to ILSpy?

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1comment
dnSpyEx vs ILSpy Comments

Guest
Positive commentDec 19, 2024
0
Great successor to dnSpy. Gives you access to more advanced features like editing the program. While generated code is often less accurate than IlSpy, it better handles obfuscation and anti-tampering solutions.
Review by a new / low-activity user.
dnSpyEx is Free and Open SourceILSpy is also Free and Open Source
dotPeek
27 likes
What's Cool about dotPeek? Decompiling .NET 1.0-4.0 assemblies to C# Quick jump to a specific type, assembly, symbol, or type member Effortless navigation to symbol declarations, implementations, derived and base symbols, and more Accurate search for symbol usages with advanc.
9 dotPeek alternatives
Cost / License
Free
Proprietary
Origin
Czechia
EU
Platforms
Windows
Is dotPeek a good alternative to ILSpy?
.NET Reflector
24 likes
Decompile Any .NET Code.
Cost / License
Paid
Proprietary
Application type
Decompiler
Origin
United Kingdom
Platforms
Windows
.NET Framework
Is .NET Reflector a good alternative to ILSpy?
Explorer Suite
11 likes
Created by Daniel Pistelli, a freeware suite of tools including a PE editor called CFF Explorer and a process viewer. The PE editor has full support for PE32/64. Special fields description and modification (.
Cost / License
Free
Proprietary
Origin
Italy
EU
Platforms
Windows
Is Explorer Suite a good alternative to ILSpy?
M
M
MSIL Disassembler
2 likes
The MSIL Disassembler is a companion tool to the MSIL Assembler (Ilasm.exe). Ildasm.exe takes a portable executable (PE) file that contains Microsoft intermediate language (MSIL) code and creates a text file suitable as input to Ilasm.exe.
Cost / License
Free
Proprietary
Origin
United States
Platforms
Windows
.NET Framework
M
Is MSIL Disassembler a good alternative to ILSpy?
C
C
CFR
2 likes
CFR will decompile modern Java features - Java 8 lambdas (pre and post Java beta 103 changes), Java 7 String switches etc, but is written entirely in Java 6. [ http://www.benf.org/other/cfr/ ].
Cost / License
Free
Open Source
Application type
Decompiler
Platforms
Mac
Windows
Linux
C
Is CFR a good alternative to ILSpy?

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1comment
CFR vs ILSpy Comments

slippycheeze
Negative commentJun 18, 2025
0
They are both decompilers, but ILSpy is for Microsoft MSIL used in C#/F#/VB &c., while CFR is for JVM ByteCodes, using in Java and a pile of other JVM languages ... so while they have the same theoretical "function", they don't overlap at all in actual use!
C
CFR is Free and Open SourceILSpy is also Free and Open Source
GrayWolf
1 like
GrayWolf is a .NET Decompiler that can edit the IL of a compiled .NET application. This Decompiler is targeted at hacking compiled .NET applications. This is a Beta product the IL editing is lacking and the deobfuscator is just getting going.
Cost / License
Free
Proprietary
Application type
Decompiler
Alerts
Discontinued
Platforms
Windows
Is GrayWolf a good alternative to ILSpy?