FossFLOW is a feature-rich, open-source Progressive Web App (PWA) designed for creating elegant and professional **isometric diagrams**. It's lightweight, fast, and privacy-friendly everything runs locally in your browser. ✨ Key Features - 🎨 **Isometric Diagramming** — Build stunning 3D-style technical and architectural diagrams with ease. - 💾 **Auto-Save** — Your work is automatically saved every 5 seconds, so you never lose progress. - 🔒 **Privacy-First** — 100% client-side; all data is stored locally in your browser. - 📤 **Import/Export** — Save or share your work as JSON files and reopen them anytime. - 🎯 **Session Storage** — Quick save without prompts or extra dialogs. - 🌐 **Offline Support** — Create and edit diagrams even without an internet connection. - 🌍 **Multilingual Interface** — Available in 8 languages: English, 简体中文, Español, Português, Français, हिन्दी, বাংলা, Русский. 🚀 **Why FossFLOW?** FossFLOW brings the power of isometric diagramming to everyone:- developers, network engineers, designers, and educators. It's ideal for visualizing system architectures, workflows, and infrastructure layouts without needing any paid tools or accounts.
FossFLOW is commonly used as a self-hosted alternative to Lucidchart, Draw.io, Visio. Replacing a SaaS tool with a self-hosted equivalent lets you avoid recurring subscription fees, keep full control of your data, and continue working even when the original vendor changes pricing, ships limits, or shuts down.
License: MIT. Built with: TypeScript, Python, Shell, JavaScript, MDX, CSS, HTML, Dockerfile. Website: https://github.com/stan-smith/FossFLOW. Source: https://github.com/stan-smith/FossFLOW.
docker run -p 80:80 -e ENABLE_SERVER_STORAGE=false stnsmith/fossflow:latest
Self-hosting gives you three things SaaS can’t: data ownership (the files live on disks you control), cost predictability (a one-time setup vs. recurring per-seat fees that grow with your household or team), and longevity (open-source means the app keeps working even if the maintainers move on, since you can pin a working version). The trade-off is that you take on the operational work of running a server, applying updates, and handling backups.
Most self-hosted apps run comfortably on modest hardware — a Raspberry Pi 4, a mini PC, a NAS with Docker support, or a small VPS is usually enough for personal or family use. CPU and RAM requirements scale with how many simultaneous users or how much data you push through FossFLOW. Storage requirements depend on the kind of data you keep; check the README for guidance on data retention.