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Generate marketing ad banners with LINE, Gemini, and Nano Banana Pro

n8nn8n12 modulesv1.0
Gemini

About This Template This workflow creates high-quality, text-rich advertising banners from simple LINE messages. It combines Google Gemini (for marketing-focused prompt engineering) and Nano Banana Pro (accessed via Kie.ai API) to generate images with superior text rendering capabilities. It also handles the asynchronous API polling required for high-quality image generation. How It Works 1. Input: Users send a banner concept via LINE (e.g., "Coffee brand, morning vibe"). 2

At a glance

Generate marketing ad banners with LINE, Gemini, and Nano Banana Pro is a ready-made n8n workflow you import as a workflow JSON file — no build required. It connects Gemini. It's free to download. Follow the 5-step import below to go live in minutes.

Platform
n8n
Connects
Gemini
Modules
12
Price
Free
Version
v1.0
Generate marketing ad banners with LINE, Gemini, and Nano Banana Pro workflow diagram

About this workflow

About This Template This workflow creates high-quality, text-rich advertising banners from simple LINE messages. It combines Google Gemini (for marketing-focused prompt engineering) and Nano Banana Pro (accessed via Kie.ai API) to generate images with superior text rendering capabilities. It also handles the asynchronous API polling required for high-quality image generation. How It Works 1. Input: Users send a banner concept via LINE (e.g., "Coffee brand, morning vibe"). 2. Prompt Engineering: Gemini optimizes the request into a detailed prompt, specifying lighting, composition, and Japanese catch-copy placement. 3. Async Generation: The workflow submits a job to Nano Banana Pro (Kie API) and intelligently waits/polls until the image is ready. 4. Hosting: The final image is downloaded and uploaded to a public AWS S3 bucket. 5. Delivery: The image is pushed back to the user on LINE. Who It’s For Marketing teams creating A/B test assets. Japanese market advertisers needing accurate text rendering. Developers looking for an example of Async API Polling patterns in n8n. Requirements n8n (Cloud or Self-hosted). Kie.ai API Key (for Nano Banana Pro model). Google Gemini API Key. AWS S3 Bucket (Public access enabled). LINE Official Account (Messaging API). Setup Steps 1. Credentials: Configure the "Header Auth" credential for the Kie.ai nodes (Header: Authorization, Value: Bearer YOURAPIKEY). 2. AWS: Ensure your S3 bucket allows public read access so LINE can display the image. 3. Webhook: Add the production webhook URL to your LINE Developers console.

n8n

How to import this n8n workflow

  1. 1

    Download the workflow JSON file after purchase.

  2. 2

    Open n8n → click the menu → Import from File.

  3. 3

    Select the downloaded JSON and import.

  4. 4

    Set up credentials for each node that requires them.

  5. 5

    Click Execute Workflow to test, then activate.

Setup guide

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