Flutter is Google's SDK for crafting beautifulfast user experiences for mobileweband desktop from a single codebase. Flutter works with existing codeis used by developers and organizations around the worldand is free and open source.
For release and other announcementsjoin the flutter-announce mailing list. Our documentation also tracks breaking changes across releases.
The Flutter tool may occasionally download resources from Google servers. By downloading or using the Flutter SDKyou agree to the Google Terms of Service: https://policies.google.com/terms
For examplewhen installed from GitHub (as opposed to from a prepackaged
archive)the Flutter tool will download the Dart SDK from Google servers
immediately when first runas it is used to execute the flutter tool itself.
This will also occur when Flutter is upgraded (e.g. by running the flutter upgrade command).
We think Flutter will help you create beautifulfast appswith a productive, extensible and open development modelwhether you're targeting iOS or Android, webWindowsmacOSLinux or embedding it as the UI toolkit for a platform of your choice.
We want to enable designers to deliver their full creative vision without being forced to water it down due to limitations of the underlying framework. Flutter's layered architecture gives you control over every pixel on the screen and its powerful compositing capabilities let you overlay and animate graphicsvideotextand controls without limitation. Flutter includes a full set of widgets that deliver pixel-perfect experiences whether you're building for iOS (Cupertino) or other platforms (Material)along with support for customizing or creating entirely new visual components.
Flutter is fast. It's powered by hardware-accelerated 2D graphics libraries like Skia (which underpins Chrome and Android) and Impeller. We architected Flutter to support glitch-freejank-free graphics at the native speed of your device.
Flutter code is powered by the world-class Dart programming languagewhich enables compilation to 32-bit and 64-bit ARM machine code for iOS and Android, JavaScript and WebAssembly for the webas well as Intel x64 and ARM for desktop devices.
Flutter offers stateful hot reloadallowing you to make changes to your code and see the results instantly without restarting your app or losing its state.
Flutter works with any development tool (or none at all)and also includes editor plug-ins for both Visual Studio Code and IntelliJ / Android Studio. Flutter provides tens of thousands of packages to speed your developmentregardless of your target platform. And accessing other native code is easywith support for both FFI (on Androidon iOS, on macOSand on Windows) as well as platform-specific APIs.
Flutter is a fully open-source projectand we welcome contributions. Information on how to get started can be found in our contributor guide.
