A simple Expense Tracker built using Node.js, JSON file storage, and vanilla JavaScript frontend. No databases or frameworks required.

Simple, file-based expense tracking in your browser.

• ✅ Add income or expense transactions
• 📋 View a list of all transactions
• 📊 Monthly balance overview
• 🗂 Category-wise summary
• ❌ Delete transactions

expense-tracker/
├── index.js              # Node.js backend (Express)
├── transactions.json     # Stores all transactions (auto-created)
├── public/
│   ├── index.html        # Frontend UI
│   └── script.js         # Frontend logic
└── README.md             # This file

git clone https://github.com/yourusername/expense-tracker.git
cd expense-tracker

npm install express

node index.js

Go to http://localhost:3000 in your browser.

{
  "description": "Groceries",
  "amount": -50.75,
  "date": "2025-05-10",
  "category": "Food"
}

• Positive amount = Income
• Negative amount = Expense

• The frontend is served from the public folder using Express.
• All transactions are saved in a file called transactions.json.
• When you add, delete, or view transactions, the backend reads/writes that file.
• The frontend dynamically updates based on the responses using JavaScript.

Request:

GET /balance/2025/05

Response:

{
  "month": "2025-05",
  "totalTransactions": 5,
  "balance": 1200
}

• Edit transactions
• User login support
• Data visualization charts
• Migrate to a real database (MongoDB/SQLite)

Your Name 📧 obwogialex728@gmail.com 🔗 github.com/AlexObwogi

This project is open source and available under the MIT License.