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

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Important notice

This workflow is provided as-is. Please review and test before using in production.

1. Workflow Overview

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...

Best for

Content Creation automation workflows
Multimodal AI automation workflows
advanced n8n builders looking for reusable templates

Tools used

n8n-nodes-base.stickynote, n8n-nodes-base.httprequest, n8n-nodes-base.webhook, n8n-nodes-base.code, @n8n/n8n-nodes-langchain.googlegemini, n8n-nodes-base.wait, n8n-nodes-base.awss3

Source and attribution

This workflow is cataloged by N8N Workflows and links back to its original n8n.io source page by Masaki Go.

Original n8n.io source

1.1 Workflow description

Title: Generate marketing ad banners with LINE, Gemini, and Nano Banana Pro
Workflow name: Generate marketing ad banners with LINE, Gemini, and Nano Banana Pro

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

Input: Users send a banner concept via LINE (e.g., "Coffee brand, morning vibe").
Prompt Engineering: Gemini optimizes the request into a detailed prompt, specifying lighting, composition, and Japanese catch-copy placement.
Async Generation: The workflow submits a job to Nano Banana Pro (Kie API) and intelligently waits/polls until the image is ready.
Hosting: The final image is downloaded and uploaded to a public AWS S3 bucket.
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

Credentials: Configure the "Header Auth" credential for the Kie.ai nodes (Header: Authorization, Value: Bearer YOUR_API_KEY).
AWS: Ensure your S3 bucket allows public read access so LINE can display the image.
Webhook: Add the production webhook URL to your LINE Developers console.

1.2 Logical Blocks

This catalog entry is organized from the workflow JSON. The node-level section below shows the executable blocks available for review before importing the template.

2. Block-by-Block Analysis

Block 1 - Main Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 2 - Check Job Status

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 3 - Sticky Note

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 4 - Sticky Note 4

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 5 - Sticky Note 5

Type / Role: n8n-nodes-base.stickyNote - stickyNote
Config choices: Version 1

Block 6 - LINE Webhook1

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 1

Block 7 - Extract Data1

Type / Role: n8n-nodes-base.code - code
Config choices: Version 1

Block 8 - Optimize Prompt (Marketing)1

Type / Role: @n8n/n8n-nodes-langchain.googleGemini - googleGemini
Config choices: Version 1

Block 9 - Submit to Nano Banana Pro1

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.1

Block 10 - Wait1

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1.1

Block 11 - Wait for Generation1

Type / Role: n8n-nodes-base.wait - wait
Config choices: Version 1

Block 12 - Parse Result1

Type / Role: n8n-nodes-base.code - code
Config choices: Version 1

Block 13 - Download Image1

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.1

Block 14 - Upload to S

Type / Role: n8n-nodes-base.awsS3 - awsS3
Config choices: Version 2

Block 15 - HTTP Request2

Type / Role: n8n-nodes-base.httpRequest - httpRequest
Config choices: Version 4.2

Block 16 - Code1

Type / Role: n8n-nodes-base.code - code
Config choices: Version 2

3. Summary Table

Workflow	Generate marketing ad banners with LINE, Gemini, and Nano Banana Pro
Complexity	advanced
Nodes	16
Categories	Content Creation, Multimodal AI
Author	Masaki Go
Published	25 Nov 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/11205/11205.json as the source template for this automation.
2. Import the template into n8n

Open n8n, import the downloaded JSON, and review each node before activating the workflow.
3. Configure credentials and variables

Replace placeholder credentials, API keys, webhook URLs, account IDs, and environment-specific values with your own settings.
4. Test with sample data

Run the workflow manually or in a staging workspace, inspect node output, and confirm downstream systems receive the expected data.
5. Activate and monitor

Enable the workflow only after testing, then monitor executions, errors, and rate limits during the first production runs.

5. General Notes & Resources

Review imported nodes carefully before activation. This catalog entry is intended to help you inspect the workflow structure, understand required services, and find related templates faster.

Node names, credentials, schedules, webhook paths, and external service limits may need adjustment for your workspace.

Download workflow JSON Original n8n.io source Content Creation workflows Multimodal AI workflows

Frequently asked questions

What does Generate marketing ad banners with LINE, Gemini, and Nano Banana Pro do?

What do I need before importing this workflow?

Review the workflow JSON, configure any required credentials in n8n, and test the automation in a safe workspace before using it in production.

Can I customize this workflow?

Yes. Use the block-by-block analysis and the downloadable JSON to inspect each node, then adjust credentials, prompts, schedules, filters, or destinations for your Content Creation, Multimodal AI use case.

Masaki Go

8 workflows

Nodes

n8n-nodes-base.stickynote n8n-nodes-base.httprequest n8n-nodes-base.webhook n8n-nodes-base.code @n8n/n8n-nodes-langchain.googlegemini n8n-nodes-base.wait n8n-nodes-base.awss3

Complexity

advanced

Published 25 Nov 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/11205/11205.json

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

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

About This Template

How It Works

Who It’s For

Requirements

Setup Steps

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Main Sticky Note

Block 2 - Check Job Status

Block 3 - Sticky Note

Block 4 - Sticky Note 4

Block 5 - Sticky Note 5

Block 6 - LINE Webhook1

Block 7 - Extract Data1

Block 8 - Optimize Prompt (Marketing)1

Block 9 - Submit to Nano Banana Pro1

Block 10 - Wait1

Block 11 - Wait for Generation1

Block 12 - Parse Result1

Block 13 - Download Image1

Block 14 - Upload to S

Block 15 - HTTP Request2

Block 16 - Code1

3. Summary Table

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

2. Import the template into n8n

3. Configure credentials and variables

4. Test with sample data

5. Activate and monitor

5. General Notes & Resources

Frequently asked questions