Question: Is there a tool that can help me understand complex PDF documents, like research papers and academic publications?

If you need a tool to comprehend complicated PDFs, ChatPDF is a great option. This AI-based interface lets you upload PDFs, ask questions, and get answers and summaries. It's good for research papers, academic papers and legal contracts. It can handle multiple languages and big batches of PDFs, too, so it's good for students, researchers and professionals.

Another good option is Scholarcy, which is geared specifically for summarizing and analyzing academic papers. It offers interactive summary flashcards, note-taking, highlighting and literature matrices. Scholarcy also can generate bibliographies and offers customizable summaries, so students and researchers can concentrate on higher-level thinking while still keeping track of details.

PDF GPT is another tool that can summarize, answer questions, translate and cite PDFs. It handles more than 90 languages and a broad range of documents. With free and Pro versions, PDF GPT can save you hours of time and effort, so it's a good tool for anyone who has to wrestle with PDFs.

If you want a tool that's geared more specifically toward generating explanations of complex subjects, check out Explainpaper. This AI-based interface lets you upload papers, flag parts you don't understand, and get detailed explanations. It also can summarize papers and analyze multiple papers, so it's good for students and researchers who need to understand their documents.