Understand your Java architecture. Refactor with confidence.
PatternIO analyzes your Java projects to detect code smells and design patterns, then suggests refactoring strategies to improve your codebase.
patternio analyze --api-token <TOKEN> ./src{
"project": "ecommerce-backend",
"smells_detected": 23,
"patterns_found": [
"Strategy", "Observer", "Factory"
],
"suggestions": [
{
"type": "refactor",
"target": "OrderProcessor.java",
"pattern": "Strategy",
"confidence": 0.94
},
{
"type": "refactor",
"target": "NotificationService.java",
"pattern": "Observer",
"confidence": 0.87
}
],
"health_score": 72
}How it works
Three steps to cleaner code
PatternIO integrates seamlessly into your development workflow. No complex setup required.
Install the CLI
Download the binary for your platform (Linux, macOS, Windows) and generate your API token from the dashboard.
Analyze your project
Run the static analysis locally on your Java codebase and push the results to the cloud with a single command.
View on Dashboard
Track project health, explore UML diagrams, and review AI-validated code smell detection results online.
Built for teams
For Java developers & teams
Everything you need to maintain a healthy, well-architected Java codebase.
Code Smell Detection
Detects Large Class, Long Method, Feature Envy, Data Clumps, High Coupling, Low Cohesion, and Duplicate Code.
Design Pattern Suggestion
Identifies all 23 GoF patterns (Behavioral, Creational, Structural) using advanced AI analysis.
AI-Powered Validation
Filter false positives with support for DeepSeek, Claude, Gemini, GPT, and Groq providers.
UML Class Diagrams
Generates Mermaid and Graphviz/DOT diagrams with inheritance, composition, and dependency relations.
Web Dashboard
Push analysis results to the cloud to track project health over time and share insights with your team.
Multiple Output Formats
Export results to Console, JSON, TXT, HTML, Mermaid, or DOT for integration with other tools.
IDE Extensions
PatternIO in your favorite IDE
Get code analysis and refactoring suggestions directly in your development environment. Download our extensions for VS Code and IntelliJ IDEA.
Visual Studio Code
Integrate PatternIO into VS Code as you write code.
- Architectural insights
- Deep integration with VsCode
- Smart refactoring recommendations
IntelliJ IDEA
Power up your IntelliJ with code quality insights.
- Architectural insights
- Deep integration with IntelliJ
- Smart refactoring recommendations
Pattern catalog
Design pattern library
Strategy
Define a family of algorithms and make them interchangeable at runtime.
Observer
Establish a subscription mechanism to notify multiple objects about events.
Factory Method
Define an interface for creating objects, letting subclasses decide the type.
Builder
Construct complex objects step by step with a fluent interface.
Adapter
Convert an interface into another interface that clients expect.
Decorator
Attach additional responsibilities to an object dynamically.
Integration
CLI & IDE integration
Use your personal API token to run analyses directly from the command line or integrate with your CI/CD pipeline. IDE extensions are now available for download.
Command Line Interface
Run analyses from your terminal with a single command.
IDE Extensions
IntelliJ IDEA and VS Code extensions.