title: Crop the white margins of text-based multi-page PDF document and convert it to image-based PDF document
body: <p>I want convert electronic book for Kindle. I tried convert large, two languages text-based PDF ebook with complex formatting styles and images into AZW3 book for Kindle using Calibre, and also tried amazon service, but conversion results poor quality with multiple errors. I can no convert PDF ebook into plain text which best suits for kindle, because ebook contains multiple formatting styles, programming code and images.</p>
  
  <p>What is the best way automatically crop the white margins of text-based multi-page PDF document and convert it to image-based PDF document, resized to fit 600 x 800 pixels?</p>