ChatDOC is a website that offers an AI-powered file-reading assistant that can extract, locate, and summarize information from documents. It uses ChatGPT technology to understand texts and provide instant answers from PDFs. The website also has a URL whitelist, so only certain websites are allowed to be accessed through it. Additionally, it has a privacy policy and terms of service in place to protect user data. ChatDOC seems to be a useful tool for quickly extracting information from documents and could be especially helpful for research or other information-heavy tasks.