... Stirling PDF focuses on performing various operations like splitting, cropping and rotating on your PDFs. PdfDing however has a different focus, it is all about reading and organizing your PDFs. ...
The project is using mozilla's pdf.js library for displaying pdfs (this is also used for firefox's build in pdf reader). As far as I am aware it should be able to work with (allmost) all pdf files.
I'm not a huge fan of python projects in general, they tend to be wildly unreliable in the long run (more the fault of python itself than the devs but the fact remains) however i am looking for something exactly like this so I'm gonna give it a shot