DartPad

Flutter Integration in DartPad

Learn how to build and run Flutter apps inside DartPad instantly—no local installation required.

Flutter in DartPad

Why Flutter in DartPad?

DartPad provides an all-in-one environment to run Dart and Flutter code. Since Dart powers Flutter, integrating Flutter into DartPad enables developers to prototype, test, and demonstrate mobile and web app UIs in seconds.

  • Build Flutter widgets interactively in the browser.
  • See UI changes instantly without recompiling.
  • Write complete Flutter apps using only a browser.
  • Test performance, layouts, and interactions in real time.
  • Share Flutter demos with public URLs or private links.

Getting Started with Flutter in DartPad

Follow these steps to write, preview, and run Flutter app code using DartPad:

  1. Open DartPad and select Flutter mode to enable Flutter SDK features.
  2. Import Flutter libraries in your code with import 'package:flutter/material.dart';.
  3. Write Flutter widgets—create layouts, UI components, and interactive features.
  4. Run your app by clicking the 'Run' button or pressing Ctrl+Enter. A preview of your Flutter app will display instantly on the right side of the editor.
  5. Customize your UI using Flutter's built-in widgets and Dart's powerful syntax.

Tips for Building in Flutter with DartPad

Optimize your workflow by leveraging DartPad’s features to build Flutter apps more efficiently:

1. Use the Live Preview

See your UI updates in real-time without switching files or closing your code. Live preview is the fastest way to iterate on Flutter widgets and layouts.

2. Save and Share

Click 'Save' to persist your code. Export a shareable link (e.g., https://dartpad.dev/flutter-app) to collaborate or present your Flutter UIs.

3. Import External Resources

DartPad supports importing external assets via URLs, enabling you to load images, fonts, and other media directly into your Flutter UI at runtime.

4. Debug with Ease

DartPad provides immediate error messages and real-time logs to help you catch bugs fast. Use console outputs to debug your Flutter app logic.

Advanced Usage - Full Flutter Projects in DartPad

Although DartPad is ideal for building simple app previews, you can also create more complex Flutter applications in the editor:

DartPad supports a complete Flutter project structure, including:

1. Dart and Flutter SDKs

DartPad comes with the latest Dart and Flutter SDKs preloaded. You can write apps that take full advantage of Flutter's features and libraries.

2. Package Support

Add external packages easily via pub.yaml configuration. This enables access to thousands of Flutter packages in your DartPad sessions.

3. Interactive UI Testing

Test user interactions like button clicks, scrolls, and gestures by simulating input directly in DartPad's Flutter UI preview.

4. Cross-Platform Testing

Use DartPad to test your Flutter app logic and UI in web and desktop environments before deployment—ensuring broad compatibility and performance.

DartPad Example - Building a Flutter Button App

Try the example below or open it in DartPad directly to get hands-on experience with Flutter integration: