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FunOS is a modern, interactive web desktop environment that runs entirely inside your browser.
It mimics the look and behavior of a real operating system — windows, taskbar, start menu, and apps — using only HTML, CSS, and Vanilla JavaScript.
No installs.
No frameworks.
Just open and run.
✔ Fully client-side (offline capable)
✔ Real window manager (drag, resize, minimize, maximize)
✔ Desktop icons & start menu
✔ Persistent settings using LocalStorage
✔ Smooth animations & modern UI
✔ Single-file deployment
- 🧮 Calculator – Arithmetic expression engine
- 📝 Notepad – Auto-saving text editor
- 🎨 Paint – Canvas-based drawing tool
- 💻 Terminal – Simulated shell with commands
- ⚙️ Settings – Wallpaper & personalization
help Show available commands
date Display system date
clear Clear terminal output
echo text Print text
reboot Reload FunOS
exit Exit message
https://github.com/SRCarlo/funos-powered-by-zai/archive/refs/heads/main.zip
git clone https://github.com/SRCarlo/funos-powered-by-zai.git
cd funos-powered-by-zai
open index.html✔ Works offline
✔ No dependencies
✔ No build steps
- HTML5
- CSS3 (Flexbox, Grid, Animations)
- JavaScript (ES6+)
- Canvas API
- Browser LocalStorage
funos-powered-by-zai/
├── index.html # Complete FunOS system
└── README.md
Everything is intentionally bundled into one HTML file for simplicity and portability.
- Learning OS concepts
- Web UI experimentation
- Portfolio project
- Hackathon demos
- Offline browser apps
- Teaching window management logic
FunOS is designed to prove that complex system-like interfaces can be built using nothing more than core web technologies.
Simple. Transparent. Hackable.
Shubham Raut
📧 Email: asphaltshubhuu@gmail.com
🔗 LinkedIn: https://www.linkedin.com/in/shubham-raut-865a21203
💻 GitHub: https://github.com/SRCarlo
MIT License
Free to use, modify, and distribute.
FunOS — a fun experiment blending operating systems and the open web 🌍