Diagrams & Whiteboards

Diagram-as-code tools, whiteboards and canvas SDKs for visual thinking.

JSON: /api/v1/directory.json (filter on category=diagrams-whiteboards) · Agents can search it with the Swarmnest MCP Server

Open-source virtual whiteboard for hand-drawn style diagrams, with an embeddable React component and a JSON scene format.

Infinite canvas SDK for React used to build whiteboards, diagram editors and AI canvas apps.

Free diagramming app for flowcharts, network and UML diagrams that runs in the browser or desktop, with an embed mode for integrations.

Diagram-as-code tool that renders UML, sequence, component, Gantt and other diagrams from a plain-text language.

Modern declarative diagram scripting language that turns text into architecture and flow diagrams with multiple layout engines.

Classic open-source graph visualization software that lays out diagrams written in the DOT language.

Unified HTTP API that renders Mermaid, PlantUML, Graphviz, D2, BPMN and many other text diagram formats to SVG or PNG.

API for creating and reading boards, sticky notes, shapes, connectors and frames on Miro's online whiteboard.

APIs for Lucidchart and Lucidspark to import diagrams, manage documents and embed visuals in other apps.

Technical design whiteboard with diagram-as-code and AI generation of architecture, sequence and ER diagrams.

Tooling for C4 model software architecture diagrams defined as code with a DSL and rendered from a single model.

Collaborative whiteboard for flowcharts, wireframes, mind maps and docs, with AI-assisted diagram generation.

AI tool that turns written text into editable diagrams, flowcharts and infographics.

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