ChatPDF is an AI-powered tool that leverages the capabilities of GPT-4 to interact with PDF documents. The primary function of ChatPDF is to provide meaningful and convenient interaction with text-based PDF files.

The tool can be used to summarize lengthy textbooks or complex documents, thus offering an efficient way to understand and digest vast amounts of written content without the need to read through each page.

At the same time, ChatPDF can generate new content based on the information within the PDF, potentially assisting in content creation or data expansion.

Furthermore, the tool also has a question answering capability, where users can ask specific questions about the content of the documents. This feature allows users to obtain precise information or clarifications about the document's content without having to search through it manually.

Users need to enable JavaScript to run the application, suggesting it is a web-based tool. Therefore, users likely to gain the most benefit from ChatPDF include students, researchers, content creators, and anyone frequently working with extensive or complex PDF files.

As the tool uses GPT-4 technology, users can expect intelligent and contextually accurate responses.