An in-memory file system for Java
⚡ Executive Summary & Quick Facts
Authoritative Sourcejimfs is jimfs is an open-source project written in Java: An in-memory file system for Java..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), google/jimfs has accumulated 2,565 GitHub stars and 292 forks. It is written in Java, licensed under Apache-2.0, and ranks #4,780 globally. It is actively maintained with the latest commit recorded on Nov 9, 2026.”
| Repository | google/jimfs ↗ |
|---|---|
| Primary Category | developer tools |
| Language & Stack | Java |
| Software License | Apache-2.0 |
| Community Traction | ★ 2.6K stars · ⑂ 292 forks · #4,780 globally |
| Maintenance | ● Active (Last commit: Nov 9, 2026) · 41 open issues |
| Target Audience | Developers and engineering teams building with Java, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 97/100 · Grade A+Yes, jimfs is actively maintained. Continuous telemetry recorded the last code commit on Nov 9, 2026 (3 days ago). Supported by 2,565 stars and 292 community forks, this repository holds a calculated health index of 97/100, reflecting very active (commits within last 14 days) and healthy issue cadence.
Star History
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+1
STARS · LAST 30 DAYS
1
PER DAY
#311
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +1 | +1 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +15 |
jimfs gained 1 stars in the last 30 days, about 1 a day, and now has 2.6K. It is about 13 years old and has averaged roughly 197 stars a year. It ranks #311 among Java repositories and #4,780 across all languages on GitHubRepo.
Trending Record
44
DAYS ON TRENDING
#1239
BEST RANK
Sep 25, 2026
FIRST APPEARANCE
Active
STATUS TODAY
jimfs has maintained a continuous presence across global trending indexes, peaking at #1239. Below is the 30-day activity profile:
💡 Overview
jimfs is an open-source project written in Java: An in-memory file system for Java.
Engineered for speed, consistency, and developer ease, it solves common hurdles in Java. 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/google/jimfs.git
cd jimfs⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
jimfs 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 jimfs 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 jimfs using your package manager: `git clone https://github.com/google/jimfs.git`
Initialize your project workspace or configuration file for jimfs.
Import jimfs into your codebase or invoke it directly from your terminal.
Execute your test suite or run `jimfs --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
google/jimfs is currently ranked #4,780 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
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|---|---|---|---|---|
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| #4,780 | google/jimfs This Project | Java | ★ 2.6K | |
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Frequently Asked Questions
What does jimfs do? +
An in-memory file system for Java
Is jimfs actively maintained in 2026? +
Yes, jimfs is actively maintained. The latest code push was recorded on Nov 9, 2026 (3 days ago). It holds a calculated Maintenance Health Score of 97/100 (A+ rating) with 2,565 stars and 41 open issues.
What language is jimfs written in? +
The primary language is Java. Topics include: software.
How many stars does jimfs have? +
jimfs has 2,565 stars and 292 forks on GitHub.
How does jimfs rank among GitHub repositories? +
With 2,565 stars, google/jimfs is ranked #4,780 globally across all repositories tracked on GitHubRepo and #311 among Java projects.
What license is jimfs distributed under? +
The repository reports a Apache-2.0 license. Always verify the repository LICENSE file for legal terms.
