Question: Is there a service that can help me annotate and review PDF documents, such as academic articles or legal contracts?

If you want a service to annotate and review PDFs, ChatPDF is a good choice. This AI-based interface lets you upload documents and ask questions to get a better understanding of PDFs. It can summarize documents, answer questions and even cite sources in the documents. It works with multiple languages and is good for students, researchers and professionals who want to get a quick, authoritative answer from a document.

Another good option is PDF GPT. It has the same abilities as ChatPDF, including summarization, question answering, translation and citation, and it can handle a broader range of documents. It works in more than 90 languages, and its ability to save you time and effort makes it a good option for anyone who needs to process and review PDFs.

Last, ChatDOC is another general-purpose tool that can handle lots of file types, including PDFs. It can answer questions, provide detailed AI analysis and transfer data securely. With a browser extension that lets you upload and analyze documents with a few clicks, ChatDOC is good for students, professionals and businesses that want to get information out of documents.