The Free n8n Workflow That Turns One Blog Post Into 5 Platform-Ready Social Posts
Every blog post I write turns into five other posts automatically. Not because I have some elaborate content system. Because I built this workflow once and now it runs whenever I paste a URL. The whole thing costs about $0.03 per run. Here's the workflow and how to get it running.
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In this post
You already wrote the content. Rewriting it five more times for different platforms is just tax on your own work.
Here's a scene I guarantee you've lived: you just finished a blog post. Took you two hours. Maybe three. You're proud of it. It's actually good.
And then you open Twitter and think: "I should probably post about this."
So you either post a lazy "new post!" link that nobody clicks — or you spend another 45 minutes rewriting the damn thing for five different platforms. A tweet here. A LinkedIn post there. Oh, and Instagram wants a caption. TikTok wants a script. Threads exists apparently.
That's exhausting. It's also completely unnecessary.
The information is ALL in the blog post. The insights are there. The value is there. You just need an agent to read it and write five different versions — each optimized for how that platform's audience actually reads and engages.
That's EXACTLY what this workflow does. And it costs about $0.03 per run.
What the workflow produces: five platform-specific posts from one URL, in about 15 seconds
You paste a blog post URL. The workflow runs. About 15 seconds later, you get back five things in a clean JSON object:
Every single one of these is written by a platform-specific AI prompt — not one generic "write me some social posts" call. The TikTok prompt knows about hooks. The LinkedIn prompt knows not to be annoying. The Twitter prompt knows about character limits. This is the difference between slop and something you can actually use.
How It Works — Every Node Explained
The workflow has 11 nodes. Here's what each one does:
The ONLY node you need to edit for basic use. Set your blog_url, your brand_voice (a sentence or two about your writing style — this goes into every AI prompt), and your author_handle for the Threads posts.
That's it. One node. Everything else reads from this.
An HTTP GET request to your blog URL. Returns the raw HTML. Nothing fancy here — just grabbing the page. Follow redirects is on, timeout is 15 seconds. Works with any publicly accessible blog post.
This is the node that makes it actually work well. Before we send content to AI, we strip out all the garbage — <script> tags, <style> blocks, nav, header, footer. All of that adds noise and wastes tokens.
The result is clean body text, capped at 8,000 characters so we don't blow up our context window. The AI reads the post content, not your Google Analytics snippet.
Five parallel OpenAI calls — all running at the SAME TIME because they're in parallel branches after node 3. This is what keeps the runtime to ~15 seconds instead of a minute.
Each prompt is platform-specific and opinionated. The Twitter prompt tells GPT to write like it understands hooks. The LinkedIn prompt explicitly bans "I'm thrilled to announce." The TikTok prompt gives it the 3-part script structure. I spent real time on these prompts so you don't have to.
All use gpt-4o-mini by default — cheap, fast, good enough. Swap to gpt-4o if you want higher quality and don't mind paying ~5x more per run.
Waits for all 5 parallel AI calls to complete, then combines them into a single execution path. The Merge node in "Combine All" mode is perfect for this — collects everything before moving on.
Assembles all five outputs into one clean JSON object with keys like twitter, linkedin, instagram, tiktok_script, threads, plus the original URL and a timestamp. Then returns it.
By default this responds to a webhook caller. If you're running it manually from the n8n editor, just check the output of the Package node — everything's there.
Setup in 5 Minutes
Here's what you need before you can run this:
1. An n8n instance. Self-hosted (free) or n8n Cloud ($20/mo). If you don't have one yet, n8n Cloud is easiest — sign up, get a URL, done. Self-hosting on a $6 Hetzner VPS with Docker is my setup and it's rock solid.
2. An OpenAI API key. Go to platform.openai.com/api-keys, generate a key, add $5 credit. That's hundreds of workflow runs. In n8n, go to Credentials → New → OpenAI API, paste your key, name it "OpenAI API" (or change the credential name in all 5 AI nodes — your call).
3. Import the workflow.
Import steps: Download the JSON below → In n8n, go to Workflows → click the ⋯ menu → Import from File → select the JSON. That's it. The workflow opens with all 11 nodes connected.
4. Edit the Config node. Open the "⚙️ Config — Set Your URL Here" node. Change blog_url to your post URL. Update brand_voice with a sentence about your writing style. Change author_handle to your @ handle.
5. Run it. Click "Test workflow." Watch the nodes light up. Check the output of the "📦 Package All Posts" node — all 5 posts are there.
Total setup time from zero: under 10 minutes if you already have OpenAI access. Under 20 if you need to create the API key.
3 Ways to Make It Even Better
This workflow is production-ready as-is. But if you want to take it further:
Upgrade 1: Auto-save to Google Sheets. After the Package node, add a Google Sheets node. Map each platform's output to a column. Now every time you run this, all your social posts go into a spreadsheet automatically — your content queue builds itself.
Upgrade 2: Deliver to Telegram or Slack. Add a Telegram or Slack node after Package. I send all my generated content to a Telegram channel so I can grab and post from my phone in seconds. No login to n8n, no copy-paste from a JSON output — just a message waiting for me.
Upgrade 3: Trigger from your CMS. Swap the Config node for a Webhook trigger. When you publish a post in WordPress, Ghost, or Webflow, have it fire a webhook with the post URL. The workflow runs automatically the second you publish. Your social posts exist before you close the laptop.
One thing to know: This workflow scrapes public blog post URLs. It works great on most sites. It won't work on paywalled content, pages that require login, or sites with aggressive bot blocking. If your own blog is blocking the scrape, check your Cloudflare rules or try adding a User-Agent header to the HTTP Request node.
Get the Workflow
Free. No email required. Click, import, run.
If it saves you time — and it WILL — share it with someone who spends too long repurposing content manually. That's the only ask.
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