I understand that you want to keep your work private and not expose your documents to the internet, but there might be a situation where the document isn't that important to you and any online solution would be sufficient, let's say you one of your friends tells you to ask the ai a math problem they want to know how to solve/learn but the ai only understands text then you need to ocr the pdf which is jpg converted then copy it to the ai, you might be on your phone or away from your desktop environment, here you might consider using an online solution like pdfequips :)