Class Diagram Generator

Stop drawing diagrams by hand. Stop typing class skeletons by hand. Do both — in one click — without ever leaving Unity.

Class Diagram Generator is the two-way bridge between your Unity C# code and PlantUML class diagrams. Generate clean, accurate UML from any folder of your project, share it with your team, then turn an updated diagram back into compiled-ready C# scripts. Architecture review, onboarding, refactor planning, technical documentation — finally in a workflow that respects your time.

Why teams use it

• See your codebase, instantly. Pick a folder (or scan the whole project), select scripts, hit Generate. PlantUML file or shareable URL — your call.
• Diagram → code, in one click. Drop a .puml file, choose an output folder, and Class Diagram Generator scaffolds the matching C# skeletons: classes, interfaces, structs, enums, namespaces, fields, properties, methods, parameters. Existing files are protected by default.
• Built for real Unity projects. Auto-scan picks up Assets/Scripts, Assets/_Project, or Assets. Drag-and-drop folders or individual .cs files. Search, bulk select, invert selection. Click any path to ping the asset.
• Designed for clean architectures. Internally split into Domain / Application / Infrastructure / Editor layers — interface-driven, testable, and easy to extend.
• Polished Editor UI. Card layout, format tabs, custom theme, status bar, in-window Docs button. It feels like a Unity-native tool, not a script-with-buttons.

What gets extracted

• Types — classes, interfaces, structs, enums
• Namespaces — rendered as PlantUML packages, with local names inside and fully qualified names in arrows (no syntax errors, no broken diagrams)
• Members — fields, properties, methods, events, with visibility (+/-/#/~) and stable modifiers ({static}, {abstract})
• Relationships — inheritance, interface realization, and associations detected from member/parameter types, with multiplicity hints (*) for collections like List<T> and arrays

What gets generated (skeleton mode)

• One .cs file per type, organized by namespace
• using UnityEngine; and using System.Collections.Generic; added automatically
• Public/private/protected/internal modifiers preserved
• Static and abstract members preserved
• Stub method bodies (throw new NotImplementedException();) so the project compiles immediately
• Skip-existing-files mode (default ON) — safe to run on real codebases

Built for

• Solo devs documenting their own work
• Studios onboarding new team members
• Tech leads planning refactors or architecture reviews
• Teachers / writers producing technical documentation
• Anyone tired of redrawing diagrams every time the code changes

Highlights at a glance

• Two-way: C# → PlantUML and PlantUML → C# skeletons
• Whole-project scan or per-folder scan
• Drag-and-drop folders and .cs files
• Export as .puml file or as a one-click PlantUML server URL
• Skip-existing-files protection on skeleton generation
• Auto-detection of common project layouts on open
• Built-in link to the online documentation
• 100% Editor-only — zero runtime overhead, ships nothing in your build

Online documentation

Full guide, examples, and FAQ: https://julestools.gitbook.io/julestools-docs/documentation/tools/class-diagram-generator

Support

Questions, bugs, feature requests: [email protected]