How to Automate Social Media Posting with n8n (AI Captions + Approval)

Automate social media posting with n8n and OpenAI using a free, approval-based workflow. In this step-by-step tutorial, I’ll show you how to build a complete n8n social media autoposter that generates AI captions, sends posts for approval, and publishes automatically once approved — no manual posting required. This workflow responds to a real viewer request and is designed for creators, marketers, and no-code builders who want social media on autopilot without losing control. You’ll learn how to: • Automatically select random media files from Google Drive or Dropbox • Generate platform-ready captions using OpenAI / ChatGPT • Add a human-in-the-loop approval system via email • Automatically post to social platforms using Blotato • Schedule everything inside n8n for hands-free content publishing This setup is beginner-friendly, scalable, and free to build with n8n. ⏱️ TIMESTAMPS 00:00 Introduction & social media automation overview 00:28 Defining the n8n social media autoposter workflow 01:10 Setting up the automation workflow in n8n 01:35 Configuring scheduled event triggers 02:27 Connecting Google Drive for media storage 03:59 Random file selection with JavaScript in n8n 05:46 Generating AI captions using OpenAI 08:34 Sending approval emails with Gmail nodes 12:15 Handling post approval and rejection logic 14:10 Posting to social media via Blotato 19:57 Final thoughts on automating social media with n8n 🚀 WHO THIS VIDEO IS FOR • Content creators tired of manual posting • Marketers managing multiple social accounts • Agencies needing approval workflows • Anyone learning n8n + AI automation 🔗 Links and Resources n8n: https://n8n.partnerlinks.io/automatewithmarc Free n8n Template to download from this build: https://n8n.io/workflows/12755-generate-and-post-instagram-captions-with-google-drive-gpt-41-mini-gmail-and-blotato/ Free n8n Workflow Template library: https://n8n.io/creators/marconi/ Blotato: https://blotato.com/?ref=marconi (Use code [MARC20] for 20% off 3 months) 💡 Connect with me: Instagram: / automatewithmarc LinkedIn: https://www.linkedin.com/in/marconi-darmawan/ Email: automatewithmarc@gmail.com 💡 Buymeacoffee https://buymeacoffee.com/automatewithmarc