Clone this repo:
  1. 9be92b2 Migrate language_2/double to NNBD. by Robert Nystrom · 87 minutes ago master
  2. 8cb5ba4 Migrate language_2/double_literals to NNBD. by Robert Nystrom · 2 hours ago
  3. ed57188 Migrate language_2/constructor to NNBD. by Robert Nystrom · 2 hours ago
  4. f91880f Update analyzer expectation for language/const/switch2_test by Konstantin Shcheglov · 2 hours ago
  5. 806ff47 Match InterfaceType(s) using allSupertypes. by Konstantin Shcheglov · 2 hours ago


A client-optimized language for fast apps on any platform

Dart is:

  • Optimized for UI: Develop with a programming language specialized around the needs of user interface creation

  • Productive: Make changes iteratively: use hot reload to see the result instantly in your running app

  • Fast on all platforms: Compile to ARM & x64 machine code for mobile, desktop, and backend. Or compile to JavaScript for the web

Dart's flexible compiler technology lets you run Dart code in different ways, depending on your target platform and goals:

  • Dart Native: For programs targeting devices (mobile, desktop, server, and more), Dart Native includes both a Dart VM with JIT (just-in-time) compilation and an AOT (ahead-of-time) compiler for producing machine code.

  • Dart Web: For programs targeting the web, Dart Web includes both a development time compiler (dartdevc) and a production time compiler (dart2js).

Dart platforms illustration

License & patents

Dart is free and open source.


Using Dart

Visit the to learn more about the language, tools, getting started, and more.

Browse for more packages and libraries contributed by the community and the Dart team.

Building Dart

If you want to build Dart yourself, here is a guide to getting the source, preparing your machine to build the SDK, and building.

There are more documents on our wiki.

Contributing to Dart

The easiest way to contribute to Dart is to file issues.

You can also contribute patches, as described in Contributing.