Build multi-platform apps in Python. No frontend experience required.
Flet is a framework that allows building mobile, desktop and web applications in Python only without prior experience in frontend development.
Your app will equally look great on iOS, Android, Windows, Linux, macOS and web.
Build a cross-platform app without knowledge of Dart, Swift, Kotlin, HTML or JavaScript - only Python!
Beautiful UI widgets with Material and Cupertino design: layout, navigation, dialogs, charts - Flet uses Flutter to render UI.
Numpy, pandas, pydantic, cryptography, opencv, pillow and other popular libraries.
Flet apps run natively in modern browsers using WebAssembly and Pyodide, with no server required. Prefer server-side? Deploy as a Python web app with real-time UI updates.
Build standalone executables or bundles for iOS, Android, Windows, Linux, macOS and web. Instantly deploy to App Store and Google Play.
Test your project on your own mobile device with Flet App. See your app updates as you make changes.
Easily wrap any of thousands of Flutter packages to use with Flet or build new controls in pure Python using built-in UI primitives.
Flet is built with Flutter which has solid accessibility foundations on Android, iOS, web, and desktop.
Below is a simple "Counter" app, with a text field and two buttons to increment and decrement the counter value:
import flet as ft
def main(page: ft.Page):
page.title = "Flet counter example"
page.vertical_alignment = ft.MainAxisAlignment.CENTER
input = ft.TextField(value="0", text_align=ft.TextAlign.RIGHT, width=100)
def minus_click(e):
input.value = str(int(input.value) - 1)
def plus_click(e):
input.value = str(int(input.value) + 1)
page.add(
ft.Row(
alignment=ft.MainAxisAlignment.CENTER,
controls=[
ft.IconButton(ft.Icons.REMOVE, on_click=minus_click),
input,
ft.IconButton(ft.Icons.ADD, on_click=plus_click),
],
)
)
ft.run(main)To run the app, install flet:
pip install 'flet[all]'then launch the app:
flet run counter.pyThis will open the app in a native OS window - what a nice alternative to Electron! 🙂
To run the same app as a web app use --web option with flet run command:
flet run --web counter.py
Want to help improve Flet? Check out the contribution guide.