PDF.ai is an AI tool that helps users chat with their PDF documents. Users can get summaries, access information, and ask questions, and it responds based on the data gathered from the submitted file. Using PDF.AI, product user manuals, legal documents, employee trainee documents, books, financial reports, and scientific papers are easy to understand and discuss. It also offers some free PDF tools, such as a resume checker, a resume scanner, a quiz generator, an invoice scanner, etc.