Optimal upload specifications

Read below to find out more about the required and recommended upload specifications for your PDF file on Paperturn.

Required Upload Specifications

  • Must be a .PDF file - any other file formats are not accepted / compatible.

  • The entire PDF file must be a single page spread (If using a PDF file with both single and double-page spreads, your pages may look distorted when converted into a flipbook & linking will not work correctly).

  • Pages must all have the same width and height.

  • Maximum file size is 512MB. You can have an unlimited number of pages, as long as the file is 512MB or less.

Optimal Upload Specifications

  • TEXT SIZE: Documents designed for web use should generally have larger text than for print, with the gold standard being viewing your design on an actual device; however, we recommend an absolute minimum font size of 14px (visible only when using the zoom function), with optimal size being 22px for easy reading without using the zoom function.

  • FORMAT: The dimensions of your flipbook is a matter of personal preference; however, the optimal dimensions for best viewing experience on monitors with standard aspect ratios of 16:9 and 16:10 is 1047px (width) x 1200px (height) (per page). In layman’s terms, a horizontal format page which is longer than it is tall.

  • IMAGES: Export the images that you use in your PDF file as images for the web.


    • Remember to include “www.” when writing the link.

    • Typos cause broken links or may direct users to the wrong website.

    • If you are using Adobe InDesign, choose File > Export and choose to save as an Adobe PDF (Interactive).

      • The Adobe PDF (Interactive) format is for saving PDF files with the interactivity added in InDesign, like links, buttons, video, and more.

InDesign dashboard showing how to save as interactive pdf

  • If you are using Adobe InDesign and choose to export the PDF as Adobe PDF (Print). Remember to include Hyperlinks.

InDesign dashboard showing where to preserve hyperlinks from PDF


Are your links not carrying over to your flipbook from a PDF created in InDesign?

Paperturn always seeks to import all links from your PDF; however, if the URLs inside the PDF are not configured as hyperlinks, they may not import properly to your flipbook. Follow the steps below to ensure your links transfer correctly.

How to convert URLs to hyperlinks in InDesign:


  • Click “Type”, then “Hyperlinks & Cross-References”, then “Convert URLs to Hyperlinks”.
  • In the box that appears, click “Convert All”.
  • InDesign will inform you how many items have been replaced. Click “Ok”, then “Done”.
  • Export your design as a PDF with hyperlinks.
How to convert URLs to hyperlinks in InDesign
How to convert URLs to hyperlinks in InDesign


From here, you can re-upload your new PDF to Paperturn to ensure the links have transferred. You can also use our overwrite function if you’d like to retain the same URL as your previous flipbook.


Create your flipbook now - no strings attached START MY FREE TRIAL