Best OCR program?

What’s the best OCR program/tool right now? It has to be free.

I’m doing a project at university and need to have my sources on my computer, so I’ve scanned a lot of book pages. Most of my sources are German (I’m not German and can only understand a tiny bit) and I want to make it searchable and be able to copy and paste the text so it’s easier to translate. I also have som English sources where it would be neat to make it searchable, but the German texts are the most important so I actually can understand what I’m reading. (We are allowed to use AI for translations and stuff like that)

I’ve tried during it through ilovePDF, smallpdf and pdf24, but they’re either not very accurate or has a very small limit on MB.

Thank you for your time!