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OpenFlowKit

OpenFlowKit

100% Free and Open Source Diagram Creator with Total Control

Website openflowkit.com
Overview

What it is

OpenFlowKit is a 100% free, open-source diagram engine for engineers, architects, and product teams who care about craft.

Intent

I need it when

Maintain diagrams as code in version control alongside architecture documentation

OpenFlowKit supports diagram-as-code workflows via its type-safe DSL and Mermaid.js syntax, allowing diagrams to be exported as JSON and committed to Git, keeping documentation and code synchronized.

Create system architecture and flowchart diagrams without manual box alignment

OpenFlowKit's Smart Import Engine parses code (Prisma, SQL, JSON, React) and auto-generates diagrams with intelligent layout via ELK.js, eliminating hours of manual alignment and keeping diagrams in sync with source code.

Build custom diagramming tools or embed diagramming into internal applications

OpenFlowKit is fully open-source (MIT licensed) with a headless engine core, allowing developers to fork, modify, and embed the diagramming engine into proprietary tools without vendor lock-in.

Export diagrams directly into Figma for design handoff without rebuilding layouts

OpenFlowKit exports native Figma vector layers with editable text and clean shapes via zero-plugin copy-paste, eliminating the need to redraw diagrams in design tools.

Generate presentation-ready animated system design videos for stakeholder communication

OpenFlowKit's cinematic export engine renders 60fps MP4 animations with automatic path routing and opacity interpolation, turning static diagrams into professional animations without keyframe setup.

Drop

Not a fit when

  • User requires cloud-based team collaboration with persistent server-side storage and real-time sync across multiple sessions
  • User needs enterprise SaaS support, dedicated account management, or commercial liability guarantees
  • User cannot provide their own OpenAI or Anthropic API keys and requires vendor-hosted LLM services
  • User requires mobile app or native desktop application; OpenFlowKit is browser-based only
  • User needs advanced features like version control history, audit logs, or compliance certifications (SOC 2, HIPAA)
Commercials

Pricing

100% free, open-source, MIT licensed. No paid tiers or enterprise editions. View pricing