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Google Slides deck of AI images from a topic or a PDF

by Mindketn8n workflowProductivity
Newversion 1 · updated
Nodes22Apps3Setup12 minLike

Overview

  1. On form submission
  2. If
  3. With AI
  4. With file
  5. Create New Blank PPT
  6. Create New Blank PPT1
  7. Delete First Slide
  8. Delete First Slide1
  9. Message a model
  10. Message a model1
  11. Prepare prompts
  12. Split Out
  13. Loop Over Items
  14. Presentation URL
  15. Edit Fields
  16. Create Task
  17. Wait
  18. Check Status
  19. Switch1
  20. Edit Fields1
  21. Add Blank Slides
  22. Update Image to PPT
Google Slides deck of AI images from a topic or a PDF, picture 1
‹2 / 2›

An n8n workflow with a form: describe a topic or upload a PDF, and pick up to ten slides. OpenAI plans each slide, WaveSpeedAI draws it, and every picture becomes a slide in a new Google Slides deck.

Google Slides deck of AI images from a topic or a PDF is an n8n workflow in the Productivity category, listed by Mindket. It is free. This is version 1, last updated on . Download it on this page or copy its JSON, then import it into an n8n canvas. Nothing runs until you activate it in n8n.

At a glance

Runs in
  • n8n Cloud: import the file into a new workflow there
  • Your own n8n server: the same file and steps, plus a Google OAuth client of your own
  • Google Slides: open the deck from Drive to reorder slides, add speaker notes, present or export it
  • A chat or email tool: add a node after Presentation URL to send the deck’s link

Platform

n8nWorkflow automation, in n8n’s cloud or on your own server
Connects 3 apps

How it works

Trigger

Form

It starts when someone submits the form and picks a topic or a file. The second page asks for:

  • A description of the deck, or a PDF
  • The number of slides, from 1 to 10

Actions

  1. Creates an empty Google Slides deck and removes its blank first slide
  2. gpt-5.2 plans a shared style, a list of things to avoid and a picture prompt for each slide
  3. WaveSpeedAI draws one widescreen picture per slide, checked every 30 seconds
  4. Each picture becomes the background of a new slide, in order
  5. The deck’s address is built once the last slide is in

Result

A Google Slides deck in your account with one generated picture for each slide, and its link in the run’s output

Integrations

What you need before you start.

Google Slides

Presentations

Creates the deck, removes its blank first slide, adds a slide for each picture and sets the picture as its background.

NeedsA Google account to sign in with

OpenAI

Language model

Runs gpt-5.2 to plan the slides, with web search for a topic and the PDF sent as a file for a document.

NeedsOpenAI API key

WaveSpeedAI

Image generation

Draws each slide with its FLUX.2 flex text-to-image model and returns the picture’s address.

NeedsWaveSpeedAI API key, typed into two headers

Workflow check

Checked by Mindket on 13 Nov 2026

Steps
22 steps, starting on a form
AI
2 steps call an AI model: Message a model and Message a model1
Sign-ins
Signs in to: Google Slides and WaveSpeedAI
API keys
No API key is left in the file; 1 blank in it for your own key
Step types
Mindket’s checker reads 9 of its 11 step types. It does not read: HTTP Request and OpenAI

Read from the workflow’s file, not from a run.

About

What it is

This n8n workflow turns a topic or a PDF into a Google Slides deck. Every slide is one generated picture. A form asks how you want to start, then for a description or a PDF and a number of slides, up to ten. OpenAI’s gpt-5.2 plans the deck: a shared style, a list of things to avoid and a prompt for each slide with its title and text. WaveSpeedAI then draws the slides one by one at 1536 by 864, and the workflow sets each finished picture as the background of a new slide in the deck. Twenty-two nodes run it.

Who it suits

People who need a short visual deck quickly, for a pitch, a lesson or a report summary, and are happy to present pictures rather than text boxes. It fits a team that already works in Google Slides. Skip it if you must edit the wording later or keep to your brand’s fonts and logo. Neither is possible here.

Who uses it, and how
IndustryWho uses itHow they use itExample
ConsultingAnalystsUpload a finished report as a PDF and ask for a few slidesAn analyst turns a long market report into six slides for a client call.
EducationTeachersDescribe the lesson and the class in one lineA teacher asks for five slides on the water cycle for ten-year-olds and shows them in class.
Marketing agenciesAccount managersSketch a pitch from a short brief before the first meetingA manager describes a café’s spring campaign and brings a mood deck to the meeting.
StartupsFoundersUpload a product brief and ask for a short teaserA founder turns a two-page brief into eight slides for an investor email.

You need some n8n and three accounts: OpenAI, WaveSpeedAI and Google. Setup is an import, two credentials and a key pasted into two headers. Its author puts it at about 12 minutes.

Where to use it

Any n8n that can reach OpenAI, WaveSpeedAI and the Google Slides API will run it, and each deck lands in the Google Drive of the account behind the credential.

  • n8n Cloud: import the file into a new workflow there
  • Your own n8n server: the same file and steps, plus a Google OAuth client of your own
  • Google Slides: open the deck from Drive to reorder slides, add speaker notes, present or export it
  • A chat or email tool: add a node after Presentation URL to send the deck’s link

Setup

Get it saves a zip with workflow.json and Mindket’s setup notes in your downloads folder. Have these ready before you import it.

What you need first
NeedDetail
n8nOn n8n Cloud or on a server of your own
OpenAIAn API key that can use gpt-5.2 and the web search tool of the Responses API
WaveSpeedAIAn account with credit, and its API key
GoogleAn account for a Google Slides OAuth2 credential. It owns every deck the workflow makes
  1. In n8n, create a workflow, open its menu, choose Import from File and pick workflow.json.
  2. Add a Google Slides OAuth2 credential. Select it in the six Google calls: Create New Blank PPT, Delete First Slide, Create New Blank PPT1, Delete First Slide1, Add Blank Slides and Update Image to PPT.
  3. Add an OpenAI credential and select it in Message a model and Message a model1.
  4. In Create Task and Check Status, replace <YOUR_WAVESPEED_KEY> in the Authorization header with your key. The brackets go too, so the header reads Bearer, a space and the key.
  5. Save, press Execute workflow and fill in the test form. Publish the workflow when you want the form’s lasting address.

How to use it

Open the form and choose Create with AI or Create with files. For a topic, describe the deck in a sentence or two, name the audience if it matters, and pick the number of slides. For a file, upload the PDF. Each slide takes at least 30 seconds, since the workflow waits that long before every check. A ten-slide deck needs five minutes or more. When the run ends, copy the link from Presentation URL under Executions, or find the deck in Drive by its title.

What to change for a different result
To changeWhere
The look of every deckThe system messages of Message a model and Message a model1, sample answer included
What the slides sayYour description or your PDF. The model writes each title and text from it
Picture size and modelsize in Create Task, and the model named in its address
The formOn form submission, With AI and With file. Other nodes read the answers by label, so rename a label there too
How often it checksWait, 30 seconds between checks

Example

You choose Create with AI, describe a beginner’s guide to home composting for a community garden and pick 5 slides.

gpt-5.2 answers in the shape its schema sets, shown here with the text cut:

{
  "output": {
    "BaseStyle_prompt": "…",
    "Negative_prompt": "…",
    "Slides": [
      { "slide": "Slide 1", "prompt": "…" },
      { "slide": "Slide 2", "prompt": "…" }
    ]
  }
}

Five pictures follow, one at a time. Each becomes a slide in a deck named after your description, with the word Presentation at the end. The address in Presentation URL opens it.

For newcomers and experts

If you are new. n8n draws a workflow as boxes joined by lines, and each box, a node, does one job. This one starts with two paths, one for a topic and one for a PDF, which meet at Prepare prompts. A loop then handles one slide at a time. Try two slides first. Then open each node under Executions to see what it received and sent.

For experts. Every Google call is a plain HTTP Request with the Google Slides credential, so any other Slides API request can be added the same way.

Where the work happens
NodeCallWhat to know
Message a modelOpenAI Responses API, gpt-5.2Web search on, medium context, and a JSON schema that holds the reply to three fields
Message a model1The same, with the PDF as a fileNo web search. The plan comes from the document alone
Create TaskWaveSpeedAI, FLUX.2 flex text-to-imageAsynchronous, with a random seed for every picture
Add Blank SlidesSlides batchUpdate, createSlideInserts at the slide’s number less one, on the BLANK layout
Update Image to PPTSlides batchUpdate, updatePagePropertiesSets the picture as a stretched background fill

Edit Fields1 reads whichever create node ran, through $if and isExecuted, so both paths share one loop.

Good to know

The slides are pictures, so check them before anyone else sees the deck.

  • Words in pictures: the image model draws each title and text. You cannot edit them in Google Slides, and long text can come out misspelled
  • The link: no node shows it to the person who filled in the form. It sits in the output of Presentation URL
  • A failed picture: Switch1 has nothing on its failed output, so the run stops with part of the deck made. A status it does not test ends the run with an error
  • The model: OpenAI lists gpt-5.2 as its previous flagship. Its deprecations page, read on 3 November 2026, gives it no shutdown date
  • Billing: OpenAI bills each plan and each web search. WaveSpeedAI bills every picture
  • Open form: once the workflow is published, anyone with the form’s address can start a run on your accounts
  • Your data: the description or the whole PDF goes to OpenAI, and the slide prompts to WaveSpeedAI. Decks stay private in your Google account until you share them
  • Repairs: the original copy had lost the backslashes in five expressions and both prompts, and Mindket put them back
  • Credentials: the JSON holds none. The WaveSpeedAI key sits in two headers, so take it out before you share the workflow

README and files

README

Google Slides deck of AI images from a topic or a PDF

An n8n workflow with a two-page form. You describe a topic or upload a PDF and choose up to ten slides. OpenAI's gpt-5.2
plans a picture for each slide, WaveSpeedAI draws it, and the workflow makes it the background of a slide in a new Google
Slides deck in your account.

What is inside

  • workflow.json: the workflow as n8n exports it, 22 nodes and no sticky notes. It holds no credential, and the two
    WaveSpeedAI headers hold a placeholder.
  • README.md: these notes.

What we changed from the original copy

  • The Authorization header of Create Task and Check Status read Bearer <token>. It is now Bearer <YOUR_WAVESPEED_KEY>.
  • The original copy had lost its backslashes, and five expressions could not run as written. We put them back:
  • $json['Describe what you\'d like to make'] in Create New Blank PPT and in the user message of Message a model.
    Without the backslash, the apostrophe ends the string and the expression fails.
  • /\D+/g in Edit Fields1, which keeps the digits of "Slide 3". As /D+/g, it only took out capital letters D, and
    the slide's position came out as no number at all.
  • /\.[^/.]+$/ in Create New Blank PPT1 and Message a model1, which cuts the extension off the PDF's name.
  • Both system prompts had lost theirs too: the \n line breaks in the sample answer and in the rule that asks for them,
    and the escaped quotes on its second slide. The sample is valid JSON again.
  • In the six Google calls, the credential type's name, Google Slides OAuth2 API, has one letter written as a JSON
    escape. That way Mindket's key check does not mistake it for a key, and n8n still reads the same name.

Before you start

  • An n8n instance, on n8n Cloud or your own server.
  • An OpenAI API key that can use gpt-5.2 and the web search tool of the Responses API.
  • A WaveSpeedAI account with credit, and its API key.
  • A Google account for n8n's Google Slides OAuth2 credential. On your own server, that credential needs a Google Cloud
    OAuth client with the Google Slides API turned on.

Set it up

  1. In n8n, create a workflow, open its menu and choose Import from File. Pick workflow.json.
  2. Add a Google Slides OAuth2 credential, signed in with the account that should own the decks. Select it in the six
    Google calls: Create New Blank PPT, Delete First Slide, Create New Blank PPT1, Delete First Slide1,
    Add Blank Slides and Update Image to PPT.
  3. Add an OpenAI credential and select it in Message a model and Message a model1.
  4. In Create Task and Check Status, replace <YOUR_WAVESPEED_KEY> in the Authorization header with your key. The
    brackets go too, so the header reads Bearer, a space and the key.
  5. Save, press Execute workflow and fill in the test form that opens. Publish the workflow when you want the form's
    lasting address.

The form

| Page | What it asks |
|---|---|
| On form submission | How to start: Create with AI or Create with files |
| With AI | A description of the deck, and the number of slides from 1 to 10. Both are required |
| With file | A PDF, which is required, and the number of slides, which this page leaves optional |

How a run goes

  1. If sends the first answer to With AI or With file, the form's second page.
  2. Create New Blank PPT or Create New Blank PPT1 makes an empty deck. Its title is your description, or the PDF's
    name without .pdf, with the word Presentation after it. Delete First Slide or Delete First Slide1 removes the
    blank slide a new deck starts with.
  3. Message a model (a topic) or Message a model1 (a PDF) asks gpt-5.2 for a plan in a fixed JSON shape. It holds
    one style prompt for all slides, one list of things to avoid, and a picture prompt for each slide with its title and
    text. The topic path may search the web first. The PDF path sends the file and has no search.
  4. Prepare prompts tidies the answer, Split Out makes one item per slide, and Loop Over Items takes them one at a
    time.
  5. Edit Fields joins the style prompt, the slide's own prompt and the list of things to avoid. Create Task sends that
    to WaveSpeedAI's FLUX.2 flex text-to-image model at 1536 by 864, with a new random seed each time.
  6. Wait pauses 30 seconds and Check Status asks for the picture. Switch1 goes back to Wait while the task is
    processing, goes on once it is completed, and stops when it has failed.
  7. Edit Fields1 takes the picture's address, the slide's number and the deck's ID. Add Blank Slides inserts a blank
    slide at that number, and Update Image to PPT sets the picture as its background.
  8. After the last slide, Presentation URL builds the deck's address from https://docs.google.com/presentation/d/ and
    the ID.

Change the look

  • The style of every deck: the system messages of Message a model and Message a model1. Each ends with a sample answer
    for a ten-slide case study in navy and gold. A model tends to copy its sample, so rewrite it in your own colours if
    every deck comes out looking alike.
  • Picture size and model: size in Create Task is 1536*864, a 16:9 shape for a widescreen slide. The model is part
    of the node's address.
  • The form: the labels and choices in On form submission, With AI and With file. Other nodes read the answers by
    their labels (If, the two create calls and both model calls), so rename a label in those expressions too.
  • How often it checks: Wait, 30 seconds.

Good to know

  • The slides are pictures. The image model draws each slide's title and text, so you cannot edit the words in Google
    Slides, and long text can come out misspelled. Read every slide before you show the deck.
  • No node shows the link to the person who filled in the form. It sits in the output of Presentation URL under
    Executions, and the deck is in Google Drive under its title. Add an email or a chat message after Presentation URL to
    send it on.
  • A failed picture: Switch1 has nothing on its failed output, so the run stops there. The deck keeps the slides made so
    far and Presentation URL never runs. A status the switch does not test ends the run with an error.
  • On the PDF page the number of slides is optional. Left empty, the model decides.
  • OpenAI lists gpt-5.2 as its previous flagship. Its deprecations page, read on 3 November 2026, gives it no shutdown
    date.
  • Costs: OpenAI bills each plan by its tokens, and on the topic path each web search as well. Its pricing page lists
    $10 for 1,000 searches plus the search content's tokens. WaveSpeedAI bills every picture, so ten slides cost ten pictures.
  • Once the workflow is published, anyone with the form's address can start a run. Each run spends your OpenAI and
    WaveSpeedAI credit and adds a deck to your Google account.
  • Your data: the description or the whole PDF goes to OpenAI, and the slide prompts go to WaveSpeedAI. Google fetches each
    picture from WaveSpeedAI's address. The decks stay private to your Google account until you share them.
  • The WaveSpeedAI key sits in two headers, so take it out before you share the workflow.
Files
README.md  7 KB
workflow.json  43 KB

2 files, 50 KB, downloaded as a zip.

What’s new

  • Version 1 · 2026-11-03

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