Activity diagrams model the executable flow of algorithms and procedures. They expose conditions, loops, function calls, exceptions, parallel branches, and return paths for debugging and control-flow analysis.
From syntax to system view
Understand code
visually.
01 / Platform
Source code is precise.
Understanding it shouldn’t be slow.
Code2UML is a software visualization platform built to turn language syntax into a shared visual model.
It identifies entities, relationships, declarations, expressions, control flow, and the structures relevant to each diagram—then translates them through a purpose-built rendering stack.
Class diagrams represent the static structure of object-oriented software. They document classes, interfaces, members, inheritance, composition, aggregation, and dependencies to make system architecture explicit.
Sequence diagrams describe time-ordered communication between objects, components, services, or users. They reveal call order, message flow, participant responsibilities, and runtime collaboration within a scenario.
State diagrams represent finite-state behavior and are particularly useful for visualizing regular expressions as automata. They show states, guarded transitions, accepted paths, events, and failure conditions.
Code2UML converts source code into clear, structured diagrams—so people can inspect architecture, trace behavior, document systems, and explain software without reading every line first.
02 / Built for software work
A shared view for
every technical conversation.
Visual platform for engineering, code review, documentation, and education.
Understand unfamiliar systems faster.
Expose architecture, dependencies, execution paths, and state changes across legacy code and new modules.
See generated code before you trust it.
Turn AI-produced code into a visual model before it is accepted, deployed, or modified.
Build explanations from real source.
Create exportable diagrams for reviews, onboarding, technical documents, clients, and stakeholders.
Connect theory to implementation.
Teach control flow, object-oriented architecture, interactions, and system lifecycles with concrete code.
03 / Diagram systems
One platform.
Four ways to see.
Move from line-by-line inspection to a view that matches the question you are asking.
Decisions, branches, calls, loops, exceptions, and execution paths.
01 / 04Classes, interfaces, members, inheritance, composition, and dependencies.
01 / 04Participants, messages, call order, and service collaboration over time.
01 / 04States, transitions, events, guards, and lifecycle behavior—including regular expressions represented as finite-state automata.
01 / 03One continuous visualization pipeline.
The CodeVisuals Engine is a purpose-built static analysis system that transforms source code into precise, structured visual models. Its language parsers cover more than 95% of the supported syntax in each language, including declarations, relationships, control flow, calls, and other language-specific constructs. Analysis happens directly from source, without compiling, executing, or introducing runtime side effects. Every transformation is deterministic, so identical source and configuration always produce the same model and the same diagram. Language-specific structures are resolved and normalized into a shared intermediate representation that preserves the meaning of the original program. Dedicated diagram generators then translate that model into editable PlantUML source and export-ready SVG/PNG or PUML assets. The result is a predictable engineering pipeline for architecture review, debugging, documentation, education, code verification, and clear technical communication.
Platform primitives
Designed beyond the happy path.
Reliable software visualization requires more than a prompt. Code2UML is built around language-specific parsing, accumulated edge-case knowledge, diagram-specific rendering behavior, and a modular architecture designed to keep expanding to additional programming languages.
Try the current workspaceLanguage-aware parsing
Understands the grammar and structures that matter to each diagram type.
Fully customizable presentation
Adapt colors, typography, spacing, line styles, element shapes, and visual hierarchy to match any documentation system or brand.
Deterministic rendering stack
With PlantUML Plus as the graphics engine, every diagram follows deterministic layout and styling rules.
Clarity at system scale
Render large, relationship-heavy diagrams while preserving structure, legibility, and a navigable view of the wider system.
Sub-second visualization
Generate most diagrams in under a second, keeping visual analysis fast enough for iterative development and review.
04 / The road ahead
From generated diagrams
to living software maps.
Code2UML’s direction is a continuously synchronized visual interface for entire software systems.
Now
Explore
Navigate between visual elements and exact source, compare versions, and investigate large repositories from a connected system view.
Next
Learn
Turn source code into clear visual models that make software structure, behavior, and relationships easier to understand.
Future
Collaborate
Keep visual documentation synchronized while teams annotate, discuss, review, and evolve software together.
See your software differently.