JSON to Dart
Convert JSON data to Dart class code with json_serializable pattern, nullable types, and fromJson/toJson methods.
How to Use
- Paste or type JSON data into the left input box.
- Optionally specify the generated Dart class name in the class name input box (default is RootObject).
- Click the "Convert to Dart" button. The converted Dart class code appears on the right.
- Click "Copy Result" to quickly copy the converted Dart code.
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About JSON to Dart
JSON to Dart is a free online code generation tool that helps you quickly convert JSON data to Dart class definitions. In Flutter development, we often need to define corresponding data model classes based on API-returned JSON data, which is time-consuming and error-prone when done manually.
Simply paste JSON data and the tool will automatically analyze the JSON structure and generate the corresponding Dart class, including json_serializable pattern with fromJson/toJson methods, nullable types (String?, int?), @JsonKey annotations, and more. Supports conversion of all JSON types including strings, numbers, booleans, arrays, and nested objects. You can customize the generated class name for direct use in your Flutter projects. The entire operation runs locally in the browser without uploading data to any server.