ReceiptAI explores the use of open-weight AI models to understand and process receipt data. Built as part of Hacktoberfest Hack Day, the project includes a fine-tuning notebook to experiment with adapting AI models for receipt-related tasks. Using accessible tools and open-source AI, it aims to make document understanding more practical, affordable, and accessible to developers. The project supports experimentation, learning, and further development of AI-powered receipt processing.