Does converting a presentation to PDF require Microsoft PowerPoint?
No. The presentation is rendered directly by the library, which is what makes conversion usable on a server or inside a container.
Which conversions are available?
PPT, PPTX, POTX, POTM and ODP convert between one another, and to PDF and HTML. The exact set of export targets varies by platform — the platform pages list theirs.
Will fonts look the same after conversion?
Only if the fonts are available to the process doing the conversion. A server with a minimal font set will substitute, and the layout will shift. Install or embed the fonts the deck uses.
Can I convert a single slide rather than the whole deck?
Yes. Slides can be rendered individually, which is how per-slide thumbnails and previews are produced without exporting the entire presentation.