Have you tried https://readwise.io https://readwise.io? I export my kindle highlights from sideloaded books through an iphone app and send them to import@readwi

Have you tried https://readwise.io https://readwise.io? I export my kindle highlights from sideloaded books through an iphone app and send them to import@readwise.io. That's better then downloading and uploading the txt file. Web is also covered. Dunno about your docuemnts though.