How to turn a document into slides with ChatGPT

A deck is not a shorter document. It is a sequence of claims, one per slide, each carrying the minimum evidence needed to make it land. Most attempts fail the same way: someone uploads a report, asks for slides, and gets the report reflowed into bullets with the section headings as titles.

Two things fix that. Separate the thinking pass from the formatting pass, and ask for a text format a slide tool can actually import.

Ask for the storyline before the slides

Run this first, and do not let it produce bullets yet.

Read this report. I need a 12 slide deck for our board that supports the decision on whether to renew. Give me the 12 slide titles only. Each title must be a full sentence stating the point of that slide, not a topic label. Nothing else.

The difference between a title and a label decides the deck. "Q3 revenue" is a filing label. "Q3 revenue grew 12%, entirely on enterprise renewals" is a slide.

Now read the twelve headlines in order. If they hold together as an argument on their own, the deck works. If they read as a table of contents, it does not, and no amount of bullet polishing will rescue it. Reorder, cut, and tell it what is missing before going any further.

This pass takes two minutes and it is where the value sits. Everything after it is mechanical.

Once the headlines hold, expand them.

For each headline, give me at most three bullets. Each bullet under twelve words. No bullet may restate the headline. If a slide needs more than three bullets, tell me it should be split rather than adding a fourth.

That last clause does real work. Without it, dense sections come back as slides with eight bullets. With it, you get told that slide 7 is really two slides, which is usually correct. Set a word ceiling too, rather than asking for something "concise". Concise gets interpreted differently every time you ask.

The outline format that pastes into PowerPoint

PowerPoint reads a plain tab indented outline. Ask for exactly that and you skip the retyping entirely.

Output a plain text outline. Slide titles at the left margin with no bullet character and no numbering. Bullets indented with a single tab. Sub points with two tabs. Nothing else in the output.

1. Save the outline as plain text

   Copy the output into a text editor and save it with a .txt extension. Keep the tabs intact, which means a plain editor rather than Word.

2. Import it as slides

   In PowerPoint, Home, New Slide, Slides from Outline, then pick the file. Every left margin line becomes a new slide with its indented lines as body text.

3. Apply your template

   Select all slides and use Home, Reset, then set the theme from the Design tab. The text is already in real placeholders, so your master takes properly.

Keeping speaker notes out of the slide text

Notes cannot come through an outline import. The format has no notes level, so if you ask for them inline they arrive as bullets on the slide, which is the single most common mess in this workflow.

Ask for two separate blocks instead.

Give me two blocks. Block one: the tab indented slide outline with no notes in it. Block two: the speaker notes, one short paragraph per slide, each starting with SLIDE 4: so I can match them up.

Import block one, then paste the notes in per slide. Both tools make you do that one at a time, but numbered and separated turns it into copy and paste rather than rewriting.

It also helps to say what notes are for. "Three sentences of what a presenter says out loud, first person, not a restatement of the bullets" produces something usable. Asking for "speaker notes" usually returns the bullets again in longer form.

Google Slides needs a different route

Google Slides has no outline import. There is no equivalent of Slides from Outline, and pasting a multi line outline into a slide puts the whole thing into one text box on one slide.

Two routes work. Build the deck in PowerPoint from the outline, then open the .pptx from Drive in Google Slides or use File, Import slides. Or paste slide by slide, which is fine for eight slides and miserable for forty. Even when the deck will live in Google Slides permanently, the PowerPoint round trip is usually faster.

When ChatGPT builds the .pptx itself

Sometimes it can. With its Python tool available it will generate a PowerPoint file and give you a download link. OpenAI does not document this as a slides feature, and the output shows it: default fonts, default layout, no template, and text often drawn onto the slide rather than placed in real placeholders, so applying your corporate theme afterwards does not take.

Worth trying when the deck is disposable or you want something to react to. For anything going in front of people in your own template, the outline route wins, because PowerPoint builds the slides from your master instead of the model drawing them from scratch.

Check the deck against the document

Two checks, both fast.

Truncation first. Documents past 2 million tokens are cut off with no warning, and the conclusions of a report live at the end. Ask what the final section is called before you ask for anything else. If it cannot say, the deck is being built from the first half of the file.

Then the numbers. Every figure on a slide gets read out loud and questioned.

For each slide, add a line giving the page or section the numbers on it came from.

Spot check three of those against the document, delete the source lines, and present. If all three hold, the rest generally do. If one is wrong, check them all.

What this comes down to

Do the argument first as one sentence headlines, then the bullets, then the format. Ask for a tab indented outline and import it rather than building slides by hand. Keep the notes in a separate numbered block. And confirm the model reached the end of the document, because the last twenty pages of a report are usually where the deck's conclusion is supposed to come from.