🔗 URL Shortener + QR Code Generator

A free, open-source, no-login URL shortener with QR code generation. Built with Next.js + TypeScript on the frontend, Express + TypeScript on the backend, and MongoDB for data storage.

🚀 Features

• 🔒 No authentication required
• 🧠 Avoids duplicate entries: already-shortened URLs are reused
• 🔁 Prevents shortening an already-shortened URL (loop protection)
• ⚙️ Domain can be changed easily via .env (no code changes needed)
• 🖼️ Extracts Open Graph metadata from original URL
• 📦 Fully open-source and ready for deployment

📦 Getting Started

1. Clone the repository

git clone https://github.com/matheusleiner/url-shortener.git
cd url-shortener

2. Install dependencies

# Install frontend and backend dependencies
cd frontend && npm install
cd ../backend && npm install

3. Set up environment variables

Create a .env file in both frontend/ and backend/ folders:

Example .env (backend)

PORT=3001
MONGODB_URI=your_mongodb_connection_string
FRONTEND_URL=https://yourdomain.com

Example .env (frontend)

NEXT_PUBLIC_API_URL=https://api.yourdomain.com

4. Run the project

# In two terminals:
cd backend && npm run dev
cd frontend && npm run dev

🧑‍💻 Contributing

Pull requests are welcome! Feel free to open issues or suggest features.

📄 License

This project is licensed under the MIT License.