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OpenFlowKit

100% Free and Open Source Diagram Creator with Total Control

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

Top comment

Hey Product Hunt! 👋 I'm V, and I built OpenFlowKit because I was tired of two things: 1. Diagram tools that look like they're from 2005, locked colors, rigid templates, enterprise beige everywhere. 2. Paying $20/month for something that should be a text file. OpenFlowKit is my answer: a diagram engine where you can write code (Mermaid or DSL), drag-and-drop, or just tell the AI what you want. It runs 100% in your browser — no signup, no cloud, no data leaving your machine. Some things I'm proud of: * Flowpilot AI — BYOK with Gemini. It actually understands diagram context. * Figma export — Copy-paste gives you editable vectors, not flat images. * The aesthetics — I spent way too long making sure diagrams look beautiful by default. It's MIT licensed and completely free. I'd love your feedback, what would make this your go-to diagram tool?