How to Build a Chatbot with OpenAI’s API and Deploy It Worldwide (Step-by-Step Tutorial)
Step-by-step guide to build a fully functional OpenAI chatbot with pre-designed UI, dark/light themes, file uploads, and global deployment options.
How to Build a Chatbot with OpenAI’s API and Deploy It Worldwide (Step-by-Step Tutorial)
Build a Fully Functional OpenAI Chatbot (Dark/Light Theme) — Step-by-Step Guide
Learn how to create a production-ready OpenAI chatbot with pre-designed UI (dark & light theme), file uploads, theme toggle, typing effects, and suggestions. Users only need to add their API key. This guide covers frontend, backend, deployment, and best practices.
Info!
This tutorial assumes basic knowledge of HTML, CSS, and JavaScript. We'll use OpenAI API securely via a backend proxy and create a fully interactive chatbot UI.
Step 1: Project Setup Create a folder and initialize Node.js project:
mkdir openai-chatbot && cd openai-chatbot
npm init -y
npm install express dotenv node-fetch
Tip: We'll also use plain HTML/CSS/JS for the frontend. Later you can replace it with React or Next.js if desired. Step 2: Frontend — Chatbot HTML Structure Use the following HTML structure:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<me…
