Online Dart Compiler

Write and run Dart code directly in your browser with this free online compiler. Dart is a client-optimized language developed by Google for building fast apps on any platform. It is the language behind Flutter, Google's UI toolkit for building natively compiled applications for mobile, web, and desktop from a single codebase.

What is Dart?

Dart is a class-based, object-oriented programming language developed by Google in 2011. It was originally designed as a JavaScript replacement but has found its primary use as the language for Flutter app development. Dart supports ahead-of-time (AOT) compilation for production apps and just-in-time (JIT) compilation for development with hot reload. It features strong typing, null safety, async/await, and a rich set of built-in libraries.

Key Features

• Null Safety: Non-nullable by default, catching null errors at compile time.
• AOT and JIT: Compile to fast native code or run with hot reload during development.
• Async/Await: Built-in support for asynchronous programming.
• Strong Typing: Catch errors early with static type analysis.
• Flutter Integration: The language of choice for cross-platform UI development.

Basic Dart Syntax

// Class definition
class Developer {
  String name;
  Developer(this.name);

  void greet() {
    print('Welcome, $name!');
  }
}

// Enum
enum Language { dart, python, java }

void main() {
  // Variables
  String site = 'LabsICT';
  int year = 2025;

  // List and loop
  List<String> languages = ['Dart', 'Python', 'Java'];
  for (var lang in languages) {
    print('Learn $lang at $site');
  }

  // Null safety
  String? nullableValue = null;
  String value = nullableValue ?? 'Default';
  print(value);

  // Object usage
  var dev = Developer('Bilal');
  dev.greet();
}

What Can You Build with Dart?

Dart is primarily used with Flutter to build cross-platform mobile, web, and desktop applications. Companies like Google, BMW, Toyota, and Alibaba use Flutter with Dart for their apps. Dart can also be used for server-side development, command-line tools, and web applications. Its ability to compile to JavaScript makes it suitable for web development, while AOT compilation produces fast native code for mobile and desktop.

Try It Yourself

Type your Dart code in the editor and click Run. The compiler supports Dart features including classes, null safety, async/await, and collection literals. Use Copy to save, Reset to restore the example, and Share to generate a link.

Related Resources

Continue with our Dart learning track, try more online compilers, or browse tutorials for step-by-step guides.