---
title: FastHTML Hello World
permalink: /futureproof/fasthtml-hello-world/
description: Learn the basics of FastHTML, a Python web framework that skips templating languages and allows direct HTML element creation with Python functions. Discover how to build a simple "Hello World" page with structured HTML using FastHTML's function-to-element mapping.
meta_description: "FastHTML 'Hello World' tutorial: Create web pages using Python functions (e.g., `H1()`, `Body()`) that map to HTML elements, skipping template languages."
meta_keywords: FastHTML, Hello World, Python web framework, HTML generation, Python functions, no templates, introduction, tutorial, Flask alternative, inline style, @rt, fast_app
layout: post
sort_order: 1
---
FastHTML is not FastAPI and your AI coding assistants will need frequent
reminding. There is no template language but Python function names. See...
```python
from fasthtml.common import *
app, rt = fast_app()
@rt("/")
def home():
return "Hello World!"
serve()
```
This will return Hello World with a request to the page, but it won't have any
of the HTML tags that, well, make it HTML, so let's add those...
```python
from fasthtml.common import *
app, rt = fast_app()
@rt("/")
def home():
return Html(
Head(
Title("SSE Proof of Concept")
),
Body(
H1("Hello World!")
)
)
serve()
```
If you view-source the HTML, you'll see:
```html
SSE Proof of Concept
Hello World!