How to Convert JSON to Dart?

1. Paste your JSON data into the left input area.
2. Define your root class name and toggle private fields if needed.
3. Click the "Generate Dart" button.
4. Copy the resulting Dart classes and use them in your Flutter/Dart project.

Example Output

For an input like { "name": "John", "age": 30 }, the generator will create:

class Autogenerated {
  String? name;
  int? age;

  Autogenerated({
    this.name,
    this.age,
  });

  Autogenerated.fromJson(Map<String, dynamic> json) {
    name = json['name'];
    age = json['age'];
  }

  Map<String, dynamic> toJson() {
    final Map<String, dynamic> data = <String, dynamic>{};
    data['name'] = this.name;
    data['age'] = this.age;
    return data;
  }
}

Why Use This JSON to Dart Tool?

• 100% Client-Side Processing: Your JSON data is never sent to any server. It is parsed entirely in your browser, ensuring maximum privacy and security.
• Support for Nested Objects & Lists: It intelligently detects complex, nested JSON objects and arrays, generating well-structured, corresponding Dart sub-classes.
• Private Fields Option: Toggle the use of private fields to generate code that strictly adheres to encapsulation best practices.
• Ready for Flutter: Generated models include standard fromJson and toJson methods commonly used in Flutter apps.

Frequently Asked Questions