How to Serve a Website With FastAPI Using HTML and Jinja2

By the end of this guide, you’ll be able to serve dynamic websites from FastAPI endpoints using Jinja2 templates powered by CSS and JavaScript. By leveraging FastAPI’s HTMLResponse, StaticFiles, and Jinja2Templates classes, you’ll use FastAPI like a traditional Python web framework.

You’ll start by returning basic HTML from your endpoints, then add Jinja2 templating for dynamic content, and finally create a complete website with external CSS and JavaScript files to copy hex color codes:

To follow along, you should be comfortable with Python functions and have a basic understanding of HTML and CSS. Experience with FastAPI is helpful but not required.