Billing-System # billingsystem

🧾 Thermal POS Billing System

📌 About the Project

This project is a lightweight, browser-based POS (Point of Sale) and Billing system designed for small shops and retail stores.

It works completely offline using browser localStorage and supports barcode-based billing, stock management, UPI QR payments, WhatsApp invoice sharing, customer history (CRM) and thermal printer style receipts.

A browser-based Point of Sale (POS) & Billing application built using
HTML, CSS & JavaScript — no backend required.

✨ Features

• 🧾 Fast billing system
• 📦 Stock management (barcode-based)
• 🔊 Barcode scan sound
• ⚠️ Low stock alerts
• 📱 UPI QR code payment
• 💬 WhatsApp invoice (text receipt)
• 🧑‍🤝‍🧑 Customer CRM & history
• 🧾 Thermal printer style receipt
• 💾 LocalStorage based (offline support)

🚀 Live Demo

👉 (https://409raja.github.io/billingsystem/)

🛠️ Tech Stack

• HTML
• CSS
• JavaScript
• LocalStorage
• GitHub Pages

📌 How to Use

1. Add stock items (with barcode/code)
2. Scan barcode or type code
3. Complete billing
4. Generate QR / WhatsApp invoice

⚠️ Note

• Works best on desktop with USB/Bluetooth barcode scanner
• Data is stored locally in browser

👨‍💻 Author

Raja Kumar