Expense Tracker is a full-stack web application built with Node.js, Express, and MongoDB that helps users manage their finances by tracking expenses across customizable categories. It features an interactive dashboard with dynamic bar charts to visualize spending patterns, along with CRUD functionality for expenses and categories. The clean, responsive UI includes modal forms for editing data, while the modular JavaScript architecture ensures maintainability. Ideal for personal budgeting or as a learning project for full-stack development.