The conformance checker for EPUB publications
Star History
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+49
STARS · LAST 30 DAYS
2
PER DAY
#232
MOST-STARRED Java
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +14 | +49 | +180 |
| Per day | 2 | 2 | 2 |
| Forks gained | +2 | +9 | +22 |
epubcheck gained 49 stars in the last 30 days, about 2 a day, and now has 2K. It is about 13 years old and has averaged roughly 152 stars a year. It ranks #232 among Java repositories and #2,960 across all languages on GitHubRepo.
Trending Record
2
DAYS ON TRENDING
#3820
BEST RANK
Oct 2, 2026
FIRST APPEARANCE
Active
STATUS TODAY
epubcheck has maintained a continuous presence across global trending indexes, peaking at #3820. Below is the 30-day activity profile:
💡 Overview
epubcheck is an open-source project written in Java: The conformance checker for EPUB publications.
Engineered for speed, consistency, and developer ease, it solves common hurdles in digital-publishing, epub, epub-publications. 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/w3c/epubcheck.git
cd epubcheck⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
JDK 17 or higher (OpenJDK / GraalVM)
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
epubcheck 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 epubcheck 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 BSD-3-Clause license.
🚀 Getting Started
Install epubcheck using your package manager: `git clone https://github.com/w3c/epubcheck.git`
Initialize your project workspace or configuration file for epubcheck.
Import epubcheck into your codebase or invoke it directly from your terminal.
Execute your test suite or run `epubcheck --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
w3c/epubcheck is currently ranked #2,960 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,955 | GIScience/openrouteservice | Java | ★ 2K | Compare ↗ |
| #2,955 | handy-computer/transcribe.cpp | C++ | ★ 2K | Compare ↗ |
| #2,957 | apple/swift-openapi-generator | Swift | ★ 2K | Compare ↗ |
| #2,958 | unkn0wn-root/resterm | Go | ★ 2K | Compare ↗ |
| #2,959 | doobidoo/mcp-memory-service | Python | ★ 2K | Compare ↗ |
| #2,960 | w3c/epubcheck This Project | Java | ★ 2K | |
| #2,961 | jplag/JPlag | Java | ★ 2K | Compare ↗ |
| #2,961 | iiab/iiab | Jinja | ★ 2K | Compare ↗ |
| #2,961 | JetBrains/JetBrainsRuntime | Java | ★ 2K | Compare ↗ |
| #2,964 | probablycorey/wax | C | ★ 2K | Compare ↗ |
| #2,965 | Fody/PropertyChanged | C# | ★ 2K | Compare ↗ |
Frequently Asked Questions
What does epubcheck do? +
The conformance checker for EPUB publications
What language is epubcheck written in? +
The primary language is Java. Topics include: digital-publishing, epub, epub-publications, epub3, epubcheck.
Is epubcheck actively maintained? +
Yes, the last recorded push was on Oct 1, 2026 with 80 open issues being tracked.
How many stars does epubcheck have? +
epubcheck has 1,970 stars and 445 forks on GitHub.
How does epubcheck rank among GitHub repositories? +
With 1,970 stars, w3c/epubcheck is ranked #2,960 globally across all repositories tracked on GitHubRepo and #232 among Java projects.
What license is epubcheck distributed under? +
The repository reports a BSD-3-Clause license. Always verify the repository LICENSE file for legal terms.
