Paste JSON → Flutter Model

Turn any API response into a ready-to-use Flutter / Dart model in seconds. Paste the JSON, type a class name, click Create file — you get a clean, null-safe model with fromJson, toJson and copyWith, including every nested object and list.

No setup, no build_runner, no extra packages in your pubspec.yaml.

✨ Demo

1. Paste the response — live preview as you type

2. Name the class and click Create file

3. The model file is created in your project and opened

🚀 Features

• Live preview — the Dart code updates while you paste or edit the JSON.
• Nested objects → separate classes — "orders": [ {...} ] becomes a List<Order> with its own Order class.
• Smart list handling — lists of primitives, lists of objects, and nested lists (List<List<int>>).
• Merges array items — fields from all items of an array are combined, so optional keys aren't lost.
• Correct number types — a field that is 10 in one item and 12.5 in another becomes double and is parsed safely with (json['x'] as num?)?.toDouble().
• Dart naming conventions — user_id → userId, full-name → fullName, while the original JSON keys are kept in fromJson/toJson.
• Reserved words handled — keys like class, default or new become classValue, defaultValue, …
• Null safety — nullable fields by default (safest for real APIs), or non-nullable with required constructor params.
• Optional extras — copyWith and toString with one click.
• Root arrays supported — paste [ {...}, {...} ] and the item model is generated.
• Zero dependencies — the generated code is plain Dart; nothing to add to pubspec.yaml.

📦 Example

Input

{
  "id": 1,
  "full_name": "Ali",
  "rating": 4.5,
  "tags": ["flutter", "dart"],
  "orders": [
    { "id": 10, "total": 25 },
    { "id": 11, "total": 12.5, "note": "gift" }
  ]
}

Output (user_model.dart)

class UserModel {
  final int? id;
  final String? fullName;
  final double? rating;
  final List<String>? tags;
  final List<Order>? orders;

  const UserModel({this.id, this.fullName, this.rating, this.tags, this.orders});

  factory UserModel.fromJson(Map<String, dynamic> json) => UserModel(
        id: json['id'] as int?,
        fullName: json['full_name'] as String?,
        rating: (json['rating'] as num?)?.toDouble(),
        tags: (json['tags'] as List<dynamic>?)?.map((e) => e as String).toList(),
        orders: (json['orders'] as List<dynamic>?)
            ?.map((e) => Order.fromJson(e as Map<String, dynamic>))
            .toList(),
      );

  Map<String, dynamic> toJson() => {
        'id': id,
        'full_name': fullName,
        'rating': rating,
        'tags': tags,
        'orders': orders?.map((e) => e.toJson()).toList(),
      };

  // + copyWith(...)
}

class Order {
  final int? id;
  final double? total;
  final String? note;
  // + constructor, fromJson, toJson, copyWith
}

🛠 How to use

The file name is generated from the class name in snake_case (PostModel → post_model.dart). If no folder is selected, the file goes to lib/models (configurable).

⚙️ Settings

🇸🇦 بالعربي

إضافة تحوّل الـ JSON Response من أي API إلى Model جاهز في Flutter خلال ثوانٍ:

1. اضغط Cmd+Alt+J والصق الريسبونس.
2. اكتب اسم الكلاس وشاهد الكود مباشرة.
3. اضغط Create file ويتم إنشاء الملف داخل lib/models (أو المجلد الذي اخترته بالزر الأيمن).

يدعم الكائنات المتداخلة، والقوائم، والـ null safety، وcopyWith، بدون أي مكتبات إضافية.

📝 License

MIT