Decompiler from Java bytecode to Java, used in IntelliJ IDEA.
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+110
STARS · LAST 30 DAYS
4
PER DAY
#136
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +4 | +110 | +360 |
| Per day | 1 | 4 | 4 |
| Forks gained | +0 | +15 | +37 |
fernflower gained 110 stars in the last 30 days, about 4 a day, and now has 4.4K. It is about 12 years old and has averaged roughly 368 stars a year. It ranks #136 among Java repositories and #1,947 across all languages on GitHubRepo.
Trending Record
12
DAYS ON TRENDING
#761
BEST RANK
Sep 24, 2026
FIRST APPEARANCE
Active
STATUS TODAY
fernflower has maintained a continuous presence across global trending indexes, peaking at #761. Below is the 30-day activity profile:
💡 Overview
fernflower is an open-source project written in Java: Decompiler from Java bytecode to Java, used in IntelliJ IDEA.
Engineered for speed, consistency, and developer ease, it solves common hurdles in decompiler, java, reverse-engineering. 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 Java 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/JetBrains/fernflower.git
cd fernflower⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
fernflower coordinates its core functionality through a modular Java 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 fernflower into Java 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 Apache-2.0 license.
🚀 Getting Started
Install fernflower using your package manager: `git clone https://github.com/JetBrains/fernflower.git`
Initialize your project workspace or configuration file for fernflower.
Import fernflower into your codebase or invoke it directly from your terminal.
Execute your test suite or run `fernflower --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
JetBrains/fernflower is currently ranked #1,947 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #1,942 | jsbin/jsbin | JavaScript | ★ 4.4K | Compare ↗ |
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| #1,945 | archtechx/tenancy | PHP | ★ 4.4K | Compare ↗ |
| #1,946 | jhlywa/chess.js | TypeScript | ★ 4.4K | Compare ↗ |
| #1,947 | JetBrains/fernflower This Project | Java | ★ 4.4K | |
| #1,948 | BraveOPotato/FckSignups | TypeScript | ★ 4.4K | Compare ↗ |
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| #1,950 | alextselegidis/easyappointments | PHP | ★ 4.4K | Compare ↗ |
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Frequently Asked Questions
What does fernflower do? +
Decompiler from Java bytecode to Java, used in IntelliJ IDEA.
What language is fernflower written in? +
The primary language is Java. Topics include: decompiler, java, reverse-engineering.
Is fernflower actively maintained? +
Yes, the last recorded push was on Oct 1, 2026 with 0 open issues being tracked.
How many stars does fernflower have? +
fernflower has 4,413 stars and 734 forks on GitHub.
How does fernflower rank among GitHub repositories? +
With 4,413 stars, JetBrains/fernflower is ranked #1,947 globally across all repositories tracked on GitHubRepo and #136 among Java projects.
What license is fernflower distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
