Java UML Generator

Generates UML class diagrams from Java source to visualize structure, dependencies, and design for developers and architects quickly.

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784+

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< 15ms

Browser Execution Speed

100%

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4.9 / 5.0

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About This Tool

Converts Java source into UML diagrams to visualize code structure and design decisions. Target users include developers, software architects, team leads, and educators who need accurate, shareable models of code without manual diagramming.
Conceptual workflow: the tool parses Java sources to build a symbol map, identifies packages, classes, interfaces, and enums, and derives relationships such as inheritance, realization, associations, and dependencies. It supports class and package diagrams with optional annotations.
Core features include AST-based parsing, customizable rendering of modifiers and generics, handling of inner types, scoped package diagrams, and multiple export formats (SVG, PNG, PlantUML). It supports Java versions 8–17 and aims for consistent diagrams across large codebases.
Use cases include onboarding, API documentation, design reviews, and impact analysis after refactoring. The tool emphasizes deterministic output, reproducibility, and fast iteration for design discussions.

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How to Use

Prepare inputs: upload Java source files or archives; specify paths or repository if supported.
Configure scope: select packages, enable inner types, set Java version and rendering options.
Run generation: initiate code-to-diagram conversion.
Review outputs: inspect SVG or PNG diagram; access PlantUML syntax if available.
Export: download diagrams or copy PlantUML for integration into docs.

Frequently Asked Questions

Find Quick Answers

What inputs can I provide?

Provide Java source files, directories, or ZIP/JAR archives containing Java code. Non-Java resources are ignored unless they assist in packaging. The tool analyzes only Java type declarations and relationships.

What diagrams are produced?

By default, UML class and package diagrams are generated, showing classes, interfaces, enums, and their relationships. Outputs can be exported as SVG, PNG, or PlantUML syntax for integration with other tools.

How does it handle large codebases?

Large repositories are processed in modules or chunks to manage memory usage. Users can filter scopes by package or module and export incremental diagrams to keep diagrams readable and maintainable.

Can I export to PlantUML or PNG?

Yes. The tool supports multiple export formats, including PlantUML text syntax and raster/vector image formats (SVG/PNG), enabling easy insertion into documentation and design reviews.

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