Publish RSS articles to LinkedIn and Instagram using OpenAI and Gemini images
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Jitesh Dugar
Description
This n8n workflow automatically converts new RSS feed articles into ready-to-publish social media posts for LinkedIn and Instagram.
Whenever a new article is detected from the RSS feed, the workflow extracts the article title, link, description, and publish date. It then uses OpenAI to generate a professional LinkedIn post, a short Instagram caption, relevant hashtags, and an image prompt. After that, Google Gemini generates a custom image, UploadToURL converts the generated image into a public image URL, and the workflow publishes the final content to LinkedIn and Instagram.
What This Workflow Does
Watches an RSS feed for new articles
Extracts article title, link, description, and publish date
Uses OpenAI to generate LinkedIn and Instagram content
Creates an AI-generated image using Google Gemini
Uploads the generated image to a public URL using UploadToURL
Publishes the AI-generated post to LinkedIn
Publishes the generated image and caption to Instagram
Node-by-Node Explanation
1. Watch RSS Feed for New Articles
What this node does
This node monitors an RSS feed and checks for new articles every hour.
How it works
The RSS Feed Trigger runs automatically based on the configured polling schedule. In this workflow, it checks the RSS feed every hour.
When a new article is found, the node outputs article data such as:
Title
Link
Publish date
Description
Content snippet
Why it is important
This node starts the automation. Instead of manually checking a blog, news website, or company update page, the workflow automatically detects fresh content and begins the social media publishing process.
2. Extract Article Data
What this node does
This node cleans and organizes the raw RSS feed data into simple fields that can be used in the next steps.
How it works
It extracts the important article details and stores them in clean fields:
article_title
article_link
article_description
published_date
3. Generate Social Media Content
What this node does
This node uses AI to create platform-ready social media content from the RSS article.
How it works
It sends the article title, description, and link to the OpenAI model and asks it to return valid JSON only.
The generated JSON includes:
content_angle
linkedin_post
instagram_caption
instagram_image_prompt
hashtags
4. Parse AI JSON Output
What this node does
This node converts the AI-generated JSON text into clean structured fields.
How it works
Sometimes AI returns JSON inside markdown code blocks. This node first removes unwanted formatting like:
Then it parses the cleaned text using:
JSON.parse()
After parsing, it returns these fields:
content_angle
linkedin_post
instagram_caption
instagram_image_prompt
hashtags
hashtags_text
Why it is important
The next nodes need structured data, not raw AI text. This node makes sure the AI output becomes proper fields that can be used by the image generation, LinkedIn, and Instagram nodes.
Error handling
If the AI output is not valid JSON, this node throws an error. This helps catch formatting issues before the workflow publishes anything.
5. Generate an Image
What this node does
This node generates an AI image for the social media post.
How it works
It uses Google Gemini image generation with the model:
models/gemini-2.5-flash-image
The image prompt comes from the parsed AI output:
$json.instagram_image_prompt
The prompt describes the visual concept, style, and layout for the image.
Why it is important
This node creates a custom visual automatically, so the workflow can publish image-based posts instead of only text updates.
6. Upload a File
What this node does
This node uploads the AI-generated image and converts it into a public image URL using UploadToURL.
How it works
After the image is generated by Google Gemini, the file is passed to the Upload a File node.
UploadToURL receives the generated image file, uploads it, and returns a publicly accessible CDN URL.
That public URL is then used by the Instagram node to publish the generated image.
Why it is important
Many social media platforms and APIs require a public image URL before they can publish media.
This node solves that problem by converting the generated image file into a shareable public link automatically.
UploadToURL
7. Publish LinkedIn Post
What this node does
This node publishes the AI-generated LinkedIn post.
How it works
It takes the LinkedIn post text from the Parse AI JSON Output node:
$('Parse AI JSON Output').item.json.linkedin_post
The LinkedIn node is configured to publish a post using the generated content.
8. Publish Instagram Post
What this node does
This node publishes the generated image and caption to Instagram.
How it works
It uses the public image URL returned from the UploadToURL node:
$json.url
It also uses the Instagram caption generated by AI:
$('Parse AI JSON Output').item.json.instagram_caption
Why it is important
This node completes the Instagram publishing process by posting both the generated image and the AI-written caption automatically.