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ILSpy vs Java Decompiler

Professional comparison and analysis to help you choose the right software solution for your needs.

ILSpy icon
ILSpy
Java Decompiler icon
Java Decompiler

ILSpy vs Java Decompiler: The Verdict

Last updated: May 2026 · Comparison by Sugggest Editorial Team

Feature ILSpy Java Decompiler
Sugggest Score
Category Development Development
Pricing Open Source

Product Overview

ILSpy
ILSpy

Description: ILSpy is a free, open-source .NET assembly browser and decompiler. It allows you to view and analyze the contents of .NET assemblies in C# and other .NET languages.

Type: software

Pricing: Open Source

Java Decompiler
Java Decompiler

Description: A Java decompiler is a program that takes in Java bytecode and converts it back into human-readable Java source code. It reverses the compilation process, allowing developers to inspect, debug, and modify programs even without access to the original source code.

Type: software

Key Features Comparison

ILSpy
ILSpy Features
  • Decompile .NET assemblies into C# and other .NET languages
  • Navigate and view the contents of assemblies
  • Search for types, methods, properties, etc.
  • View metadata and attributes for types and members
  • Compare different versions of assemblies
  • Plugin architecture to extend functionality
Java Decompiler
Java Decompiler Features
  • Decompiles Java bytecode back into Java source code
  • Supports decompiling multiple Java versions - Java 1.0 to Java 8
  • Provides syntax highlighting for decompiled source code
  • Allows searching and renaming identifiers in decompiled code
  • Supports decompiling entire JARs, class files and zip archives
  • Generates call graphs and control flow graphs
  • Integrates with popular IDEs like Eclipse, IntelliJ and NetBeans

Pros & Cons Analysis

ILSpy
ILSpy
Pros
  • Free and open source
  • Works on Windows, Linux and Mac
  • Supports wide range of .NET assembly versions
  • Integrates with Visual Studio
  • Active development and user community
Cons
  • Limited decompilation of obfuscated assemblies
  • No official support offered
  • UI is basic and unpolished in places
  • Steep learning curve for some advanced features
Java Decompiler
Java Decompiler
Pros
  • Recovers lost or unavailable source code
  • Helps understand and debug compiled programs
  • Simplifies code inspection and modification
  • Improves productivity by reducing reverse engineering effort
  • Enables code reuse from compiled libraries
Cons
  • May not perfectly reconstruct original source code
  • Limited support for decompiling obfuscated bytecode
  • Generated source code can be difficult to read
  • Does not retain original formatting, comments, etc
  • Unethical if used to steal source code

Pricing Comparison

ILSpy
ILSpy
  • Open Source
Java Decompiler
Java Decompiler
  • Not listed

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