Hi useroffice3,
Welcome the the Community! Converting your PDF statements into CSV files is a great idea, as it'll reduce the amount of manual entry you'd need to do in QuickBooks Online. While Intuit doesn't have the ability to convert files, there are numerous available online, some which are free to use. I recommend searching Google for a PDF to CSV file converter, checking out the different ones available to determine which works best for you.
Have a good day!