In this journey, I explore automating PDF autofill using LangChain and LangFlow. Leveraging LangFlow and OpenAI, I streamline the employment form completion process, demonstrating steps to install LangFlow and set up a PostgreSQL table. Despite encountering challenges in prototyping with LangFlow, the exploration progresses to auto-fill PDFs. After extracting form fields and LLaMA model setup, I employ LangChain to fetch PostgreSQL data. Concluding with Python manipulation to interpolate and update the PDF, the process achieves seamless auto-fill. Dive into the details, overcome challenges, and witness the power of LangChain and LangFlow in revolutionizing PDF automation.