Flutter documentation

To see changes to the site since our last release, see What's new.

Once you've Set up Flutter, you should follow the Write your first Flutter app codelab and read Flutter fundamentals. These resources are opinionated documentation that guide you through the most important parts of building a Flutter app.

Coming from another platform? Check out Flutter for: Android, SwiftUI, UIKit, React Native, and Xamarin.Forms developers.

Building layouts

Learn how to create layouts in Flutter, where everything is a widget.

Understanding constraints

Once you understand that "Constraints flow down. Sizes flow up. Parents set positions", then you are well on your way to understanding Flutter's layout model.

Adding interactivity to your Flutter app

Learn how to add a stateful widget to your app.

FAQ

Get the answers to frequently asked questions.

For more Flutter at Google I/O 2025, check out How to build agentic apps with Flutter and Firebase AI Logic and How Flutter makes the most of your platforms.

Dive deeper into how Flutter works under the hood! Learn why you write standalone widgets instead of using helper methods or what is "BuildContext" and how is it used?

To learn about all of the Flutter video series, see our videos page.

We release new videos almost every week on the Flutter YouTube channel:

Explore more Flutter videos