Flowchart GitHub Repositories (2026) · Open Source Tools

Turn any idea, plan, or codebase into a beautiful interactive diagram. An agent skill for Claude Code, Codex, and more.

Generation of diagrams like flowcharts or sequence diagrams from text in a similar manner as markdown

React Flow | Svelte Flow - Powerful open source libraries for building node-based UIs with React (https://reactflow.dev) or Svelte (https://svelteflow.dev). Ready out-of-the-box and infinitely customizable.

Draw and edit draw.io diagrams by chatting with an AI. Web app, desktop app, and an MCP server for Claude Code, Cursor, Codex and VS Code.

An open-source service that generates image URLs for diagrams based on the provided Mermaid code.

FlowGram is an extensible workflow development framework with built-in canvas, form, variable, and materials that helps developers build AI workflow platforms faster and simpler.

Easily generate flowcharts and diagrams from text ⿻

ngDiagram – open-source Angular library for interactive diagrams, node-based editors, and workflow builders. Angular-first: signals and templates.

Animated, explorable diagrams for Claude and other coding agents, from a short JSON spec.

Arkdraw is an open-source diagramming app for creating flowcharts, UML, ER diagrams, network maps, wireframes, and mind maps with a built-in AI assistant that generates and edits diagrams from natural-language prompts.