I scanned my job application into a PDF but the file is too big for the upload site that caps at 900 kb. I need to shrink it without messing up the pages.
I had the same issue with scanned contracts, and converting the pages to grayscale and rescanning at around 150 dpi usually made the biggest difference. If you already have the PDF, use the Optimize or Compress option, then check that the text and signatures are still readable before uploading.