FastHTML — Build AI Web Apps in Pure Python

What is FastHTML?

FastHTML is a Python web framework for building modern web applications in pure Python — no JavaScript, no templates, no frontend build tools.

In one sentence: Pure-Python web framework using HTMX for interactivity — Python functions generate HTML. The fastest way to build AI dashboards and agent UIs.

For: AI developers who don't want to learn frontend frameworks.

Core Features

1. Pure-Python Components

Build HTML elements with Python functions.

2. HTMX Interactivity

No JavaScript — HTMX handles partial updates and form submissions.

3. Built-In Auth and Database

SQLite database and authentication middleware out of the box.

4. AI App Templates

Quickly build chat interfaces, dashboards, and other AI apps.

FAQ

Q: Production ready? A: Yes — built on Starlette and Uvicorn, used by fast.ai in production.

Q: Who created it? A: Jeremy Howard, founder of fast.ai.