Generate and publish Instagram carousels with Gemini and Google Slides

Generate and publish Instagram carousels automatically

Turn a single topic into a published Instagram Carousel in minutes.

Creating educational carousel posts usually takes hours: writing the script, designing the slides in Figma/Canva, exporting images, and scheduling. This workflow automates the entire pipeline using Gemini AI, Google Slides, and the Meta Graph API.

It generates the content, designs the visuals by manipulating a template, and publishes the carousel directly to your Instagram Business account.

🚀 What this workflow does

1. Script Generation: Runs daily (or on demand) to prompt Google Gemini to write a 6-slide educational script (Hook, Mistake, Why It Matters, Value, Tip, CTA).
2. Design Automation:

• Copies a master Google Slides template.
• Uses a "Find & Replace" operation to insert the AI-generated text into the correct placeholders.
• Generates thumbnail images for each slide.

1. Image Hosting: Uploads the slide images to ImgBB to get public URLs (required by Meta's API).
2. Publishing:

• Creates a carousel container on Instagram using the Meta Graph API.
• Checks the container status until it is "FINISHED".
• Publishes the media to your feed.

1. Logging: Records the post details, captions, and status in Google Sheets.

💡 Key Features

• True Design Automation: Doesn't just overlay text on images; it uses real Google Slides templates, allowing for complex layouts and branding.
• Smart Polling: Includes a "Wait & Check" loop to ensure the media container is fully processed by Facebook before attempting to publish (prevents API errors).
• Structured Content: The AI is prompted to follow a proven "Viral Educational" framework (Hook -> Value -> Action).
• Asset Management: Automatically organizes generated slide images and links in Google Sheets for your archives.

🛠️ Prerequisites

• Google Cloud: Enabled APIs for Drive, Slides, Sheets, and Gemini.
• Meta Developer App: An Instagram Business account connected to a Facebook Page, with a System User token (instagram_basic, instagram_content_publish, pages_read_engagement).
• ImgBB Account: A free API key for temporary image hosting.
• Templates: A Google Sheet and Google Slide template (links provided in the workflow sticky notes).

📝 Setup Instructions

1. Resources: Copy the provided Google Sheet and Slide templates to your Drive.
2. Credentials: Authenticate Google, Meta, and ImgBB in n8n.
3. Configuration:

• Update the Google Drive node with your Slide Template ID.
• Update the Google Sheets nodes with your Sheet ID.
• Update the HTTP Request nodes with your ImgBB API Key and Instagram Account ID.

1. Run: Activate the schedule or click "Execute" to generate your first post!

Need help setting this up or want a custom automation for your agency? I specialize in building agentic workflows for consultants and agencies.

📧 Contact me: [email protected]