It is possible with the preflight tool of Adobe Acrobat DC Pro.
I need to make each page the size of an A4 page,
Since a PDF page can automatically fit any screen size and any paper size, the right question is: why?
I dont have Acrobat DC, I have XI Pro. I'm not buying another version.
How can a PDF auto fit any paper size? I have a pdf that was originally A4 size, I have a script that cut each page in half (horizontally). Now I want to make each half a full A4 page and stretch it across the page. My thinking is that I can make a PDF more readable on a kindle.
How can a PDF auto fit any paper size?
You will find a "Fit to paper"* or a "Fit to sheet"* option in the print dialog box.
A Kindle don't care about the page size, as all screen readers it just require a tagged (so really responsive) PDF document for the best user experience.
* I'm not sure about the proper translation in English language