Design and post LinkedIn content with AI captions and custom templates

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Important notice

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

1. Workflow Overview

This workflow leverages n8n to automate LinkedIn content creation from start to finish. Upload an image and quote through a web form, and get a professionally designed post with AI generated captio...

Best for

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

Tools used

n8n-nodes-base.webhook, n8n-nodes-base.code, n8n-nodes-base.httprequest, n8n-nodes-base.respondtowebhook, n8n-nodes-base.linkedin, n8n-nodes-base.editimage, n8n-nodes-base.stickynote

Source and attribution

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

Original n8n.io source

1.1 Workflow description

Title: Design and post LinkedIn content with AI captions and custom templates
Workflow name: Design and post LinkedIn content with AI captions and custom templates

Features

Randomly selects from 6 professional design templates for visual variety
Converts HTML designs to high-quality images (90-95% JPEG quality)
Generates engaging captions using OpenAI's GPT models
Built-in caption editor for customization before posting
Direct publishing to LinkedIn profiles or company pages
Auto-compresses images for optimal LinkedIn upload

Prerequisites

N8N Instance: A running n8n instance (cloud or self-hosted)
OpenAI API: Active account with API access for caption generation
LinkedIn Account: Profile or company page with API access
Image Conversion API: HTML CSS to Image account
Web Hosting: Platform to host the web form (Netlify, Vercel, or custom server)

Setup Instructions

1. Deploy Web Form

Download the provided web form template
Host on your preferred platform
Copy both webhook URLs from your n8n workflow
Update form's webhook endpoints with your n8n URLs

2. Configure Image Conversion

Sign up at htmlcsstoimage.com
Get your API credentials (User ID + API Key)
Add to HTTP Request node as Basic Auth credentials

3. Connect OpenAI API

Create API key at OpenAI Platform
In the ChatGPT HTTP Request node, add Header parameter:
- Key: Authorization
- Value: Bearer YOUR_API_KEY
Recommended model: gpt-4 or gpt-3.5-turbo

4. Authenticate LinkedIn

Create LinkedIn OAuth2 credential in n8n
Follow the authentication flow and grant required permissions
Select the credential in the "Create a post" LinkedIn node
Choose post destination (personal profile or company page)

5. Test the Workflow

Submit test data through the web form
Monitor n8n execution panel for successful completion
Verify image generation, caption quality, and LinkedIn posting
Adjust settings as needed based on results

Notes

Processing time averages 10-20 seconds from upload to preview
All 6 design templates are fully responsive and LinkedIn-optimized
Caption editor allows full customization before publishing to LinkedIn

For questions or issues, please contact me for consulting and support : Linkedin.

🔗 Test with sample data first.

Access Web Form Template

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 - Webhook - Receive Form

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

Block 2 - Create HTML Design

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

Block 3 - HTML to Image (HCTI)

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

Block 4 - Download Image

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

Block 5 - Prepare Image Data

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

Block 6 - Prepare Final Response

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

Block 7 - Respond to Webhook1

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

Block 8 - Create a post

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

Block 9 - Webhook-LinkedIn-post

Type / Role: n8n-nodes-base.webhook - webhook
Config choices: Version 2.1

Block 10 - Respond to Webhook

Type / Role: n8n-nodes-base.respondToWebhook - respondToWebhook
Config choices: Version 1.4

Block 11 - Edit Image

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

Block 12 - Sticky Note

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

Block 13 - Sticky Note1

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

Block 14 - Parse Form Data

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

Block 15 - ChatGPT - Generate Caption

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

Block 16 - Sticky Note2

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

Block 17 - Sticky Note4

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

3. Summary Table

Workflow	Design and post LinkedIn content with AI captions and custom templates
Complexity	advanced
Nodes	17
Categories	Content Creation, Multimodal AI
Author	Gilbert Onyebuchi
Published	09 Dec 2025

4. Reproducing the Workflow from Scratch

1. Download the workflow JSON

Use the JSON export at /data/workflows/11620/11620.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 Design and post LinkedIn content with AI captions and custom templates 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.

Gilbert Onyebuchi

12 workflows

Nodes

n8n-nodes-base.webhook n8n-nodes-base.code n8n-nodes-base.httprequest n8n-nodes-base.respondtowebhook n8n-nodes-base.linkedin n8n-nodes-base.editimage n8n-nodes-base.stickynote

Complexity

advanced

Published 09 Dec 2025

Likes 0

View on n8n.io Download Workflow

Install path: /data/workflows/11620/11620.json

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Design and post LinkedIn content with AI captions and custom templates

Workflow preview

Important notice

1. Workflow Overview

Best for

Tools used

Source and attribution

1.1 Workflow description

Features

Prerequisites

Setup Instructions

1. Deploy Web Form

2. Configure Image Conversion

3. Connect OpenAI API

4. Authenticate LinkedIn

5. Test the Workflow

Notes

🔗 Test with sample data first.

1.2 Logical Blocks

2. Block-by-Block Analysis

Block 1 - Webhook - Receive Form

Block 2 - Create HTML Design

Block 3 - HTML to Image (HCTI)

Block 4 - Download Image

Block 5 - Prepare Image Data

Block 6 - Prepare Final Response

Block 7 - Respond to Webhook1

Block 8 - Create a post

Block 9 - Webhook-LinkedIn-post

Block 10 - Respond to Webhook

Block 11 - Edit Image

Block 12 - Sticky Note

Block 13 - Sticky Note1

Block 14 - Parse Form Data

Block 15 - ChatGPT - Generate Caption

Block 16 - Sticky Note2

Block 17 - Sticky Note4

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