· v2.3.2 available·Python-first reactive web framework

Build Web Apps in Pure Python. No JavaScript.

Build high-performance, scalable, server-side reactive web applications — without a separate frontend framework or a complex JavaScript stack.

$pip install duckframework
100% PythonNo JavaScript required
WebSocket UIReal-time by default
BSD-3Free forever
duck ~ myapp
Lively UI

Real-time UI, zero JavaScript

Lively is a real-time UI engine built into Duck. Components update over WebSockets without full page reloads — keeping your stack clean and predictable. No React. No Vue. Just Python.

Counter App Example

components/counter.py
python
# Simple counter implementation
from duck.html.components.label import Label
from duck.html.components.button import Button

# Initialize counter
counter = 0

# Build components
label = Label(text=counter)
button = Button(text='Increment')

def on_click(btn, *_) -> None:
    global counter
    counter += 1

    # Real-time update over WebSocket — no JavaScript needed
    label.text = counter


button.bind('click', on_click, update_targets=[label])

Try Our Live Demo

Get Started in Seconds

Install Duck and scaffold a full project with a single command. No boilerplate hunting, no config files to set up manually.

terminal
bash
$ pip install duckframework
$ duck makeproject myproject
$ cd myproject
$ python web/main.py # Starts server on http://localhost:8000

Read the full documentation