AI Prompt

Type a topic, get a fully designed deck

Describe what you want a deck about — a topic, an argument, a pitch — and BananaSlides builds the outline and renders every slide for you. The pure-prompt path.

Free credits to try · No credit card required

What it does

The fastest path from idea to deck.

Sometimes you don't have a source document or a video. You just have an idea: "I want a deck on X." That's what this tool is for. Type the topic, choose how many slides, pick a theme and style, and we generate the whole thing — outline and visuals — end to end.

It's the same pipeline our other tools use; the only difference is that the input is your prompt instead of an extracted transcript or document body. That makes this the fastest tool we offer, and the most flexible: you can describe an angle, an audience, a tone, even a specific structure, and the outline step will respect it.

Use it when you need to ship a deck on a topic you know well but don't want to manually structure. Use it when you need a starting point you'll edit later. Use it when an audience is waiting and you have two minutes.

How it works

Three steps from source to deck

Type the topic

Anywhere from one sentence ("Climate change for non-scientists") to a paragraph spelling out the structure and audience.

🍌

BananaSlides

A 10-slide deck on the history of the banana trade

10 slides · Modern Purple & Blue

We outline it

Gemini turns your prompt into a slide-by-slide structure — titles, key points, supporting examples — sized for your chosen slide count.

AI Outline

Draft

1Title slide
2Why this matters
3Key point #1
4Key point #2
5Supporting data
6Counter-arguments
7What to do next

Render the deck

Each slide gets generated as a real designed image in your theme, style, and aspect ratio. Iterate by tweaking the prompt and re-running.

Designed deck

Features

What you get

Flexible prompts

Topic-only, full-structure, audience-specific — the outline step adapts to whatever you give it.

Pick your slide count

From 3 slides for a stand-up to 20+ for a workshop. The outline scales accordingly.

Theme + style consistency

Pick once; every slide stays visually coherent across the deck.

Reference images

Pass a logo, screenshot, or moodboard image to steer the visual identity of the deck.

Design prompts

Add a written aesthetic direction ("editorial, lots of whitespace, sans-serif") to nudge every slide.

Saved to your account

Every deck you generate is stored in your dashboard. Re-download, share, or rebuild any time.

Who uses it

Real use cases

Internal stand-ups

Five-slide updates for a weekly team meeting — generated faster than you'd type them in a doc.

Workshop and class prep

Lecturers and trainers use this to draft session decks they then edit, instead of starting from a blank template.

Pitch first drafts

Get a 10-slide first pass at a pitch deck in two minutes — useful even if you'll heavily edit it later.

Conversation starters

When a client asks "what would a deck on X look like?", generate it live on the call.

Manual vs BananaSlides

Why bother automating?

The traditional path is open PowerPoint, find a template, fight placeholders. Here's what changes:

Aspect	Manual	BananaSlides
Time to first draft	30–90 minutes	Under 2 minutes
Visual design	Template stock	Generated per slide
Outline quality	You write it	AI proposes; you tweak
Iterating on the angle	Rewrite slides one by one	Edit prompt, regenerate
Consistency	Drifts as you build	Same theme + style everywhere

The reasoning

Why a good prompt produces a better deck than a good source document

When you upload a source — a PDF, an article, a video — the AI's job is to compress: figure out what mattered, keep that, drop the rest. That's a harder task than it sounds, and the result is bounded by what was in the source.

When you write a prompt, you skip the compression and feed the AI exactly the angle you want. That gives the outline step more signal to work with: who the audience is, what tone to take, what to emphasize. Prompts that mention audience and tone produce decks that feel substantially more deliberate than prompts that just name a topic.

Even so, prompts are not magic. The model still benefits from specifics: numbers, names of frameworks, the exact decision you want the deck to support. Treat the prompt as the kickoff email you'd send to a junior who's about to build the deck for you.

Pro tips

Write prompts that produce better decks

These four habits separate weak prompts from strong ones.

Name the audience

"For a board of investors" produces a very different deck than "for a college intro class." Always include who's in the room.

Specify the angle, not just the topic

"Climate change" is too broad. "The economic case for carbon pricing, for skeptical policymakers" is a deck.

Hint at structure when you have one

If you know you want problem → solution → call-to-action, say so. The outline step will respect it.

Add a design prompt for branding

Use the design-prompt field to describe the look: "corporate, navy and white, minimal illustration" gives the visuals a consistent identity.

FAQ

Common questions

How long can the prompt be?

A few sentences is usually ideal — enough to specify topic, angle, audience, and tone. Very long prompts (multi-paragraph) work but can dilute the focus. If you have that much detail, consider uploading it as a DOCX or PDF instead.

Can the deck be in another language?

Yes. Mention the language in your prompt or in the design prompt field, and the outline + slide generation steps will produce that language. Same with multi-language decks if you specify which slides are in which language.

How many slides should I generate?

For most prompts, 8–12 slides hits the sweet spot. Under 5 feels thin; over 20 starts producing repetition. Generate at the lower end first — you can always re-run with a higher count if needed.

Will the same prompt always produce the same deck?

No. The outline step uses generative AI, which has randomness baked in. Re-running the same prompt gives you a different take each time — useful for iteration.

Can I add a reference image?

Yes. The generator accepts a reference image to steer visual style. Drop in a brand color sample, a logo, or a moodboard image and the slides will inherit elements of it.

Is the topic stored anywhere?

Yes — generated decks are saved to your account so you can come back to them. The topic you typed is stored alongside the deck for your reference. If you'd rather it stays only in your browser, generate, download, and delete from your dashboard.

Do I need an account?

Yes. Generating slides consumes credits, and credits are tied to your BananaSlides account. New accounts get a small free pack so you can try the tool end-to-end without paying. You can sign up with email or Google in under thirty seconds, and the source you've already entered (URL, file, or prompt) is preserved across the redirect.

Can I edit the slides after generation?

Each generated slide is delivered as a high-resolution image. You can download individual slides, or download the whole deck as a ZIP and drop the images into PowerPoint, Keynote, Google Slides, or Notion as a starting point. For text edits, regenerate the slide with a tweaked outline — the deck is fast enough that iterating beats hand-fixing pixels.

What is the BananaSlides format?

BananaSlides decks are designed to be visual, not bullet-heavy. Each slide is rendered end-to-end by an image model so you get a real layout — typography, illustration, color — instead of a generic template with your text dropped in. You choose the theme, style, and aspect ratio up front, and the AI keeps every slide visually consistent across the deck.

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