TSDiagram is a browser-based diagramming tool that allows developers to create visual diagrams directly from TypeScript code. Instead of manually drawing diagrams, users define data structures using TypeScript constructs such as interfaces, type aliases, and classes, and the tool automatically renders them as connected nodes in a diagram.

The platform focuses on “diagrams as code,” where TypeScript serves as the source of truth. As users write or edit code, the diagram updates to reflect relationships between types, making it easier to understand how data flows and how different structures are connected.

TSDiagram includes an automatic layout engine that arranges nodes efficiently while still allowing manual adjustments. If a user moves a node, the rest of the diagram adapts without overriding manual positioning. The tool also persists diagram state locally (via URL or browser storage), enabling easy sharing and continuation of work.

Diagrams can be exported as SVG, making them suitable for documentation, presentations, and architecture overviews. The tool is lightweight, runs entirely in the browser, and requires no setup or installation.

TSDiagram is positioned as both a quick diagramming utility and a foundation for deeper code visualization workflows, where developers can better understand complex systems by mapping types and their relationships visually.

Key features include:

• Generate diagrams directly from TypeScript interfaces, types, and classes
• Automatic layout of nodes with manual adjustment support
• Real-time synchronization between code and diagram
• Export diagrams as SVG for sharing and documentation
• Local persistence via URL and browser storage
• Lightweight, browser-based editor with no setup required

Common use cases include:

• Visualizing TypeScript data models
• Documenting API schemas
• Understanding relationships in complex codebases
• Creating architecture diagrams from code
• Sharing system structures with teams

TSDiagram is developed as an open-source project aimed at improving code visualization and making TypeScript structures easier to understand through diagrams.