A deck becomes a document, notes and all
PowerPoint is the tenth conversion. A .pptx goes in and one document comes out: a section per slide, in the order the deck plays, bullets still nested and tables still tables — and the speaker notes underneath each one, which are the half of a deck nobody outside the room has ever been able to read.
Nine conversions here read a document. This one reads a performance.
A slide is a section
Every slide becomes a section under its own heading, and the sections come in the order the deck plays. That is not the order the files inside it are numbered in: a slide dragged to the front keeps the name it was given when it was made, so the running order is read from the presentation's own list of slides instead.
Bullets keep their nesting, however deep it goes. A numbered list stays numbered. Tables stay tables — with the merged cells that every slide-drawn table is full of unpicked, rather than left behind as columns of nothing. Links keep the addresses behind them.
The notes come with it
The notes pane is where the argument is usually written, in sentences, by somebody who knew the slide above it was only the summary they were going to read out. It is also the first thing lost when a deck is passed on: exporting to PDF drops it, copying the slides out by hand never sees it, and every other converter treats a deck as the thing on screen.
Here each slide's notes follow that slide's own section, quoted and labelled, still attached to the slide they belong to.
When a slide has no title
A deck exported from Google Slides or Keynote often has no title placeholders at all — every shape on the slide is just a text box somebody drew. Where that happens, a first line short enough to be a heading is treated as one, which is the difference between a contents list of forty real titles and one that reads "Slide 2, Slide 3, Slide 4".
What it does not read
Charts and SmartArt. A chart's numbers live in a spreadsheet embedded in the file and SmartArt's words in a separate diagram part, and both would arrive as a shapeless list with none of the arrangement that made them worth drawing. A slide that is only a diagram keeps its heading and its notes and says so plainly, which is honest about what was there.
It runs in the browser, like every other conversion here. The deck is not uploaded.