CFT (Carbon Footprint Tracker) is a full-featured web application that enables users to calculate, monitor, and reduce their personal carbon emissions through transparent, verifiable calculations. After creating a secure account with email verification, users log monthly lifestyle data across four key categories: food consumption, transportation methods, electricity usage, and waste generation. The platform then computes accurate CO₂ equivalents and presents this data through interactive Recharts visualizations, allowing users to track their environmental impact over time, project yearly footprints, and receive personalized reduction recommendations. A unique community leaderboard feature fosters motivation by enabling users to compare their progress anonymously with others. Built on a production-grade MERN stack (MongoDB, Express.js, React 18, Node.js) with enterprise-level security including bcrypt password hashing, JWT authentication, HTTP-only cookies, Redis caching, rate limiting, and protection against XSS and NoSQL injection attacks, CFT delivers a fast, secure, and scalable solution. The application features dark mode support, responsive design, and is hosted on Vercel (frontend) and Render (backend) with MongoDB Atlas for data persistence, demonstrating professional full-stack development practices while democratizing meaningful climate action.