How I built an OpenAI-Powered app in Replit

Sign up for the course: https://dub.sh/nocodemba Get 59 free AI business ideas here: https://dub.sh/free-ai-biz-ideas In this tutorial, you’ll learn exactly how to integrate LLM APIs like OpenAI into Replit to build a functional one-page AI app — no setup headaches required. We’ll walk through the full process of building an AI makeup advisor, where users can upload or take a selfie, choose an occasion (e.g. work, party, date), and receive personalized feedback powered by OpenAI. 🧠 What you’ll learn: - How to prompt Replit to build your frontend and connect to an LLM - How to structure AI responses for consistency (text vs. JSON schema) - How to integrate image upload + webcam capture - How to adapt prompts based on selected user input (e.g. the occasion) - Why OpenAI’s output formatting matters for UI - How to expand your app into a more robust MVP 🧰 Tools used in this video: Replit – https://replit.com/ OpenAI API – https://platform.openai.com/docs/overview Playground – https://platform.openai.com/playground/prompts