A lot of archive files are pdf. If they are typed and legible pdf.ai OCR gives impressive results. With the demo version you can also upload that OCR’d pdf and then use AI to analyse it, and for example, ask for a summary. Generally, if you have a single document with pdf.ai then it doesn’t fabricate information and gives a pdf page ref - which if you click on it the left pane shows the reference. You could also use the OCR’d pdf with Unriddle which (at the moment) seems a little more factual than pdf.ai.