I need a way to size down and compress batches of PDF files. I'd prefer to do this on Windows, but Linux would be fine if it meant a smoother workflow.
I know that there's programs such as NitroPDF and Acrobat that allow you to accomplish this, but I'm afraid it would have to be done on a file-by-file basis. These programs also aren't cheap and I'd prefer not to buy them just so I can use one or two features.
Background info: I use CamScanner to digitize receipts and invoices for entry into accounts (FreeAgent). CamScanner pdfs are all A4 sized and multi-page ones often exceed the 2MB attachment limit.