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README.md Copy Chapter

<p align="center">
<a href="https://flet.dev"><img src="https://raw.githubusercontent.com/flet-dev/flet/refs/heads/main/media/logo/flet-logo.svg" height="150" alt="Flet logo"></a>
</p>

<p align="center">
<em>Build multi-platform apps in Python. No frontend experience required.</em>
</p>

<p align="center">
<a href="https://github.com/flet-dev/flet/blob/main/LICENSE" target="_blank">
<img src="https://img.shields.io/github/license/flet-dev/flet.svg" alt="License" /></a>
<a href="https://pypi.org/project/flet" target="_blank">
<img src="https://img.shields.io/pypi/v/flet?color=%2334D058&label=pypi" alt="Package version" /></a>
<a href="https://pepy.tech/project/flet" target="_blank">
<img src="https://static.pepy.tech/badge/flet/month" alt="Monthly downloads" /></a>
<a href="https://pypi.org/project/flet" target="_blank">
<img src="https://img.shields.io/badge/python-%3E%3D3.10-%2334D058" alt="Python >= 3.10" /></a>
<a href="https://github.com/flet-dev/flet/actions/workflows/ci.yml" target="_blank">
<img src="https://github.com/flet-dev/flet/actions/workflows/ci.yml/badge.svg" alt="Build status" /></a>
<a href="https://github.com/flet-dev/flet/tree/main/website/static/docs/assets/badges/docs-coverage" target="_blank">
<img src="https://flet.dev/docs/assets/badges/docs-coverage/flet.svg" alt="Docstring coverage" /></a>
</p>

---

Flet is a framework that allows building mobile, desktop and web applications
in Python only without prior experience in frontend development.

<img src="https://flet.dev/img/pages/home/single-code-base.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;Single code base for any device Copy Section

Your app will equally look great on iOS, Android, Windows, Linux, macOS and web.

<img src="https://flet.dev/img/pages/home/python.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;Build an entire app in Python Copy Section

Build a cross-platform app without knowledge of Dart, Swift, Kotlin, HTML or JavaScript - only Python!

<img src="https://flet.dev/img/pages/home/controls.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;150+ built-in controls and services Copy Section

Beautiful UI widgets with Material and Cupertino design: layout, navigation, dialogs, charts - Flet uses Flutter to render UI.

<img src="https://flet.dev/img/pages/home/python-packages.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;50+ Python packages for iOS and Android Copy Section

Numpy, pandas, pydantic, cryptography, opencv, pillow and other popular libraries.

<img src="https://flet.dev/img/pages/home/web-support.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;Full web support Copy Section

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.

<img src="https://flet.dev/img/pages/home/packaging.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;Built-in packaging Copy Section

Build standalone executables or bundles for iOS, Android, Windows, Linux, macOS and web. Instantly deploy to App Store and Google Play.

<img src="https://flet.dev/img/pages/home/test-on-ios-android.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;Test on iOS and Android Copy Section

Test your project on your own mobile device with Flet App. See your app updates as you make changes.

<img src="https://flet.dev/img/pages/home/extensible.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;Extensible Copy Section

Easily wrap any of thousands of Flutter packages to use with Flet or build new controls in pure Python using built-in UI primitives.

<img src="https://flet.dev/img/pages/home/accessible.svg" width="25" align="top" />&nbsp;&nbsp;&nbsp;Accessible Copy Section

Flet is built with Flutter which has solid accessibility foundations on Android, iOS, web, and desktop.

Flet app example Copy Chapter

Below is a simple "Counter" app, with a text field and two buttons to increment and decrement the counter value:

``python title="counter.py"
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:

then launch the app:

This will open the app in a native OS window - what a nice alternative to Electron! 🙂
<p align="center">
    <img src="https://flet.dev/docs/assets/getting-started/counter-app/macos.png" width="45%" />
</p>
To run the same app as a web app use --web option with flet run command:

<p align="center">
<img src="https://flet.dev/docs/assets/getting-started/counter-app/safari.png" width="60%" />
</p>

Learn more Copy Chapter

* Website
* Documentation
* Roadmap
* Apps Gallery

Community Copy Chapter

* Discussions
* Discord
* X (Twitter)
* Bluesky
* Email us

Contributing Copy Chapter

Want to help improve Flet? Check out the contribution guide.