FastAPI+Uvicorn+Gradio

Rapidly Building High-Quality Web Interfaces

Posted by LuochuanAD on April 4, 2026 本文总阅读量

Background

Previously, the web pages in AIAgent projects were built using Html+Css+Js, in one word: ugly.

Choice

FastAPI + Gradio for quickly building attractive UIs

Below is the UI for RAG visualization:

The code is very simple, as follows:

https://github.com/LuochuanAD/Fine-tuning-Learn/tree/main/FastAPI%2BUvicorn%2BGradio_Demo

Trade-offs

Use cases for Gradio

  • Creating AI demos
  • Building internal tools
  • Rapid prototyping (MVP)
  • Agent debugging interfaces
  • RAG visualization

Limitations (when using Gradio)

  1. Limited UI customization capabilities
  2. Limited complexity for frontend interactions
  3. Not suitable for production-level ToC products

Future

In the future, I plan to use Next.js + FastAPI to build the frontend and backend of a ToC AIAgent.