You’re absolutely right. The thing is that I’m using a plugin that nicely creates pages for my presentations, and does the whole grab the pdf, convert it using that third party service, stick the result in a gallery slider routine at the same time. Meaning it all happens on the back-end of the live site the same I would create a normal post. I should dive into that plugin’s code to see where it calls that API and e.g. replace that with working with a ready made batch of images to stick into a gallery (as Keynote on Mac can provide them directly e.g.), which would entail deciding where to make the break between what’s done locally and what’s done on the webhosting package (or how to move everything there). It’s on the backlog, but it may be a while before it floats to the top of that list 😀