Design and Post LinkedIn Content with AI Captions and Custom Templates

Description

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 captions, ready to publish in seconds.

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