icsharpcode/ILSpy
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
Star History
Momentum
+654
STARS · LAST 30 DAYS
22
PER DAY
#7
MOST-STARRED C#
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +154 | +654 | +2K |
| Per day | 22 | 22 | 22 |
| Forks gained | +19 | +74 | +186 |
ILSpy gained 654 stars in the last 30 days, about 22 a day, and now has 26.2K. It is about 16 years old and has averaged roughly 1.6K stars a year. It ranks #7 among C# repositories and #358 across all languages on GitHubRepo.
Trending Record
2
DAYS ON TRENDING
#1178
BEST RANK
Sep 27, 2026
FIRST APPEARANCE
Active
STATUS TODAY
ILSpy has maintained a continuous presence across global trending indexes, peaking at #1178. Below is the 30-day activity profile:
💡 Overview
ILSpy is an open-source project written in C#: .NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!.
Engineered for speed, consistency, and developer ease, it solves common hurdles in c-sharp, decompile, decompiler. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C# for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/icsharpcode/ILSpy.git
cd ILSpy⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C# environment and standard tooling
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
ILSpy coordinates its core functionality through a modular C# pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Production System Integration
Embed ILSpy into C# backend services to handle core application logic.
CI/CD Automated Pipelines
Run automated validation, builds, and integration suites during deployments.
Developer Tooling & Workflows
Accelerate developer onboarding with pre-configured project utilities.
Open Source Extension
Fork and customize internal modules under the repository's open MIT license.
🚀 Getting Started
Install ILSpy using your package manager: `git clone https://github.com/icsharpcode/ILSpy.git`
Initialize your project workspace or configuration file for ILSpy.
Import ILSpy into your codebase or invoke it directly from your terminal.
Execute your test suite or run `ILSpy --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
icsharpcode/ILSpy is currently ranked #358 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #353 | jenkinsci/jenkins | Java | ★ 26.6K | Compare ↗ |
| #354 | NandhaKishorM/laya | Python | ★ 26.4K | Compare ↗ |
| #355 | apache/flink | Java | ★ 26.4K | Compare ↗ |
| #356 | NixOS/nixpkgs | Nix | ★ 26.3K | Compare ↗ |
| #357 | vapor/vapor | Swift | ★ 26.2K | Compare ↗ |
| #358 | icsharpcode/ILSpy This Project | C# | ★ 26.2K | |
| #359 | dapr/dapr | Go | ★ 26.1K | Compare ↗ |
| #360 | apache/incubator-seata | Java | ★ 26K | Compare ↗ |
| #361 | zulip/zulip | Python | ★ 26K | Compare ↗ |
| #362 | bazelbuild/bazel | Java | ★ 25.9K | Compare ↗ |
| #363 | henrygd/beszel | Go | ★ 25.8K | Compare ↗ |
Frequently Asked Questions
What does ILSpy do? +
.NET Decompiler with support for PDB generation, ReadyToRun, Metadata (&more) - cross-platform!
What language is ILSpy written in? +
The primary language is C#. Topics include: c-sharp, decompile, decompiler, decompiler-engine, dotnet.
Is ILSpy actively maintained? +
Yes, the last recorded push was on Sep 27, 2026 with 173 open issues being tracked.
How many stars does ILSpy have? +
ILSpy has 26,151 stars and 3,715 forks on GitHub.
How does ILSpy rank among GitHub repositories? +
With 26,151 stars, icsharpcode/ILSpy is ranked #358 globally across all repositories tracked on GitHubRepo and #7 among C# projects.
What license is ILSpy distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
