diff --git a/example/.gitignore b/example/.gitignore
index 3db3823..bf6a5bc 100644
--- a/example/.gitignore
+++ b/example/.gitignore
@@ -45,3 +45,7 @@ app.*.map.json
 
 # Aurora generated
 /aurora/flutter
+
+# Dart generated
+*.g.dart
+*.freezed.dart
diff --git a/example/lib/l10n/app_en.arb b/example/lib/l10n/app_en.arb
index bd7d8a8..a51d44c 100644
--- a/example/lib/l10n/app_en.arb
+++ b/example/lib/l10n/app_en.arb
@@ -1,4 +1,9 @@
 {
+  "@_FREEZED": {},
+  "freezedTitleDefault": "It's default class, 74 of lines",
+  "freezedTitleFreezed": "It's freezed class, 21 of lines",
+  "freezedSubtitle": "Methods: fromJson, copyWith, toJson, toString, operator ==, hashCode.",
+
   "@_DARTZ": {},
   "dartzTitle": "Convert size",
   "dartzDesc": "Convert the size grid of Russia to the size grid of Europe.",
diff --git a/example/lib/l10n/app_ru.arb b/example/lib/l10n/app_ru.arb
index 258d113..cde7dd7 100644
--- a/example/lib/l10n/app_ru.arb
+++ b/example/lib/l10n/app_ru.arb
@@ -1,4 +1,9 @@
 {
+  "@_FREEZED": {},
+  "freezedTitleDefault": "Класс по умолчанию, 74 строки",
+  "freezedTitleFreezed": "Класс c freezed, 21 строка",
+  "freezedSubtitle": "Методы: fromJson, copyWith, toJson, toString, operator ==, hashCode.",
+
   "@_DARTZ": {},
   "dartzTitle": "Преобразовать размер",
   "dartzDesc": "Преобразовать размерную сетку России в размерную сетку Европы.",
diff --git a/example/lib/packages/build_runner/package.dart b/example/lib/packages/build_runner/package.dart
new file mode 100644
index 0000000..942b083
--- /dev/null
+++ b/example/lib/packages/build_runner/package.dart
@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2023. Open Mobile Platform LLC.
+ * License: Proprietary.
+ */
+import 'package:flutter_example_packages/base/package/package_dialog.dart';
+
+/// Package values
+final packageBuildRunner = PackageDialog(
+  key: 'build_runner',
+  descEN: '''
+    The build_runner package provides a concrete way of generating files using 
+    Dart code. Files are always generated directly on disk, and rebuilds 
+    are incremental - inspired by tools such as Bazel.
+    ''',
+  descRU: '''
+    Пакет build_runner предоставляет конкретный способ создания файлов с 
+    использованием кода Dart. Файлы всегда генерируются непосредственно на 
+    диске и перестраиваются являются инкрементными — вдохновлены такими 
+    инструментами, как Bazel.
+    ''',
+  messageEN: '''
+    This is a platform independent plugin used in this app, should work 
+    for you too.
+    ''',
+  messageRU: '''
+    Это плагин независимый от платформы, используется в этом приложении, 
+    должен работать и у вас.
+    ''',
+  version: '2.3.3',
+  isPlatformDependent: false,
+);
diff --git a/example/lib/packages/freezed/model.dart b/example/lib/packages/freezed/model.dart
index 98718c5..c431b93 100644
--- a/example/lib/packages/freezed/model.dart
+++ b/example/lib/packages/freezed/model.dart
@@ -3,6 +3,8 @@
  * License: Proprietary.
  */
 import 'package:flutter/widgets.dart';
+import 'package:flutter_example_packages/packages/freezed/user_entity.dart';
+import 'package:flutter_example_packages/packages/freezed/user_entity_freezed.dart';
 import 'package:scoped_model/scoped_model.dart';
 
 /// Model for [FreezedPage]
@@ -10,4 +12,16 @@ class FreezedModel extends Model {
   /// Get [ScopedModel]
   static FreezedModel of(BuildContext context) =>
       ScopedModel.of<FreezedModel>(context);
+
+  UserEntity userEntity = UserEntity.fromJson(const {
+    'name': 'Default',
+    'email': 'default@yandex.ru',
+    'age': 12,
+  });
+
+  UserEntityFreezed userEntityFreezed = UserEntityFreezed.fromJson(const {
+    'name': 'Default',
+    'email': 'default@yandex.ru',
+    'age': 12,
+  });
 }
diff --git a/example/lib/packages/freezed/page.dart b/example/lib/packages/freezed/page.dart
index 0ae75ae..3177f78 100644
--- a/example/lib/packages/freezed/page.dart
+++ b/example/lib/packages/freezed/page.dart
@@ -2,12 +2,16 @@
  * Copyright (c) 2023. Open Mobile Platform LLC.
  * License: Proprietary.
  */
+import 'dart:convert';
+
 import 'package:flutter/material.dart';
 import 'package:flutter_example_packages/base/di/app_di.dart';
 import 'package:flutter_example_packages/base/package/package.dart';
+import 'package:flutter_example_packages/theme/radius.dart';
 import 'package:flutter_example_packages/widgets/base/export.dart';
 import 'package:flutter_example_packages/widgets/blocks/block_info_package.dart';
 import 'package:flutter_example_packages/widgets/layouts/block_layout.dart';
+import 'package:flutter_example_packages/widgets/texts/export.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 
 import 'model.dart';
@@ -42,6 +46,45 @@ class _FreezedPageState extends AppState<FreezedPage> {
               crossAxisAlignment: CrossAxisAlignment.start,
               children: [
                 BlockInfoPackage(widget.package),
+                TextTitleLarge(l10n.freezedTitleDefault),
+                const SizedBox(height: 8),
+                TextBodyMedium(l10n.freezedSubtitle),
+                const SizedBox(height: 14),
+                Container(
+                  width: double.infinity,
+                  decoration: BoxDecoration(
+                    color: Colors.blue.shade50,
+                    borderRadius: AppRadius.small,
+                  ),
+                  child: Padding(
+                    padding: const EdgeInsets.all(10),
+                    child: TextBodyMedium(
+                      const JsonEncoder.withIndent('   ').convert(
+                          model.userEntity.copyWith(name: 'My name').toJson()),
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 20),
+                TextTitleLarge(l10n.freezedTitleFreezed),
+                const SizedBox(height: 8),
+                TextBodyMedium(l10n.freezedSubtitle),
+                const SizedBox(height: 14),
+                Container(
+                  width: double.infinity,
+                  decoration: BoxDecoration(
+                    color: Colors.blue.shade50,
+                    borderRadius: AppRadius.small,
+                  ),
+                  child: Padding(
+                    padding: const EdgeInsets.all(10),
+                    child: TextBodyMedium(
+                      const JsonEncoder.withIndent('   ').convert(model
+                          .userEntityFreezed
+                          .copyWith(name: 'My name')
+                          .toJson()),
+                    ),
+                  ),
+                ),
               ],
             ),
           ),
diff --git a/example/lib/packages/freezed/user_entity.dart b/example/lib/packages/freezed/user_entity.dart
new file mode 100644
index 0000000..d852223
--- /dev/null
+++ b/example/lib/packages/freezed/user_entity.dart
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2023. Open Mobile Platform LLC.
+ * License: Proprietary.
+ */
+import 'package:flutter/foundation.dart';
+
+@immutable
+class UserEntity {
+  const UserEntity({
+    required this.name,
+    required this.email,
+    required this.age,
+  });
+
+  factory UserEntity.fromJson(Map<String, dynamic> json) {
+    return UserEntity(
+      name: json['name'] as String,
+      email: json['email'] as String,
+      age: json['age'] as int,
+    );
+  }
+
+  final String name;
+  final String email;
+  final int age;
+
+  UserEntity copyWith({
+    String? name,
+    String? email,
+    int? age,
+  }) {
+    return UserEntity(
+      name: name ?? this.name,
+      email: email ?? this.email,
+      age: age ?? this.age,
+    );
+  }
+
+  Map<String, dynamic> toJson() {
+    return {
+      'name': name,
+      'email': email,
+      'age': age,
+    };
+  }
+
+  @override
+  String toString() {
+    return 'UserEntity('
+        'name: $name'
+        'email: $email'
+        'age: $age'
+        ')';
+  }
+
+  @override
+  bool operator ==(dynamic other) {
+    return other is UserEntity &&
+        other.name == name &&
+        other.email == email &&
+        other.age == age;
+  }
+
+  @override
+  int get hashCode {
+    return Object.hash(
+      runtimeType,
+      name,
+      email,
+      age,
+    );
+  }
+}
diff --git a/example/lib/packages/freezed/user_entity_freezed.dart b/example/lib/packages/freezed/user_entity_freezed.dart
new file mode 100644
index 0000000..7dd2917
--- /dev/null
+++ b/example/lib/packages/freezed/user_entity_freezed.dart
@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2023. Open Mobile Platform LLC.
+ * License: Proprietary.
+ */
+import 'package:freezed_annotation/freezed_annotation.dart';
+
+part 'user_entity_freezed.freezed.dart';
+part 'user_entity_freezed.g.dart';
+
+@freezed
+class UserEntityFreezed with _$UserEntityFreezed {
+  const factory UserEntityFreezed({
+    required String name,
+    required String email,
+    required int age,
+  }) = _UserEntityFreezed;
+
+  factory UserEntityFreezed.fromJson(Map<String, dynamic> json) =>
+      _$UserEntityFreezedFromJson(json);
+}
diff --git a/example/lib/packages/freezed_annotation/package.dart b/example/lib/packages/freezed_annotation/package.dart
new file mode 100644
index 0000000..7fbc8cd
--- /dev/null
+++ b/example/lib/packages/freezed_annotation/package.dart
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2023. Open Mobile Platform LLC.
+ * License: Proprietary.
+ */
+import 'package:flutter_example_packages/base/package/package_dialog.dart';
+
+/// Package values
+final packageFreezedAnnotation = PackageDialog(
+  key: 'freezed_annotation',
+  descEN: '''
+    Annotations for freezed. This package does nothing without freezed.
+    ''',
+  descRU: '''
+    Аннотации для freezed. Этот пакет ничего не делает без freezed.
+    ''',
+  messageEN: '''
+    This is a platform independent plugin used in this application in the demo 
+    of the freezed plugin.
+    ''',
+  messageRU: '''
+    Это плагин независимый от платформы, используется в этом приложении в 
+    демострации работы плагина freezed.
+    ''',
+  version: '2.2.0',
+  isPlatformDependent: false,
+);
diff --git a/example/lib/packages/intl/package.dart b/example/lib/packages/intl/package.dart
index 6f88cbf..92e801a 100644
--- a/example/lib/packages/intl/package.dart
+++ b/example/lib/packages/intl/package.dart
@@ -18,13 +18,13 @@ final packageIntl = PackageDialog(
     форматирование и разбор даты/числа, а также двунаправленный текст.
     ''',
   messageEN: '''
-  This is a platform independent plugin used in this app, should work 
-  for you too.
-  ''',
+    This is a platform independent plugin used in this app, should work 
+    for you too.
+    ''',
   messageRU: '''
-  Это плагин независимый от платформы, используется в этом приложении, 
-  должен работать и у вас.
-  ''',
+    Это плагин независимый от платформы, используется в этом приложении, 
+    должен работать и у вас.
+    ''',
   version: '0.17.0',
   isPlatformDependent: false,
 );
diff --git a/example/lib/packages/json_annotation/package.dart b/example/lib/packages/json_annotation/package.dart
new file mode 100644
index 0000000..28eeecc
--- /dev/null
+++ b/example/lib/packages/json_annotation/package.dart
@@ -0,0 +1,28 @@
+/*
+ * Copyright (c) 2023. Open Mobile Platform LLC.
+ * License: Proprietary.
+ */
+import 'package:flutter_example_packages/base/package/package_dialog.dart';
+
+/// Package values
+final packageJsonAnnotation = PackageDialog(
+  key: 'json_annotation',
+  descEN: '''
+    Defines the annotations used by json_serializable to create code for 
+    JSON serialization and deserialization.
+    ''',
+  descRU: '''
+    Определяет аннотации, используемые json_serializable для создания кода для
+    JSON Serialization и Deserialization.
+    ''',
+  messageEN: '''
+    This is a platform independent plugin used in this application in the demo 
+    of the freezed plugin.
+    ''',
+  messageRU: '''
+    Это плагин независимый от платформы, используется в этом приложении в 
+    демострации работы плагина freezed.
+    ''',
+  version: '4.8.0',
+  isPlatformDependent: false,
+);
diff --git a/example/lib/packages/json_serializable/package.dart b/example/lib/packages/json_serializable/package.dart
new file mode 100644
index 0000000..bbd0ab5
--- /dev/null
+++ b/example/lib/packages/json_serializable/package.dart
@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2023. Open Mobile Platform LLC.
+ * License: Proprietary.
+ */
+import 'package:flutter_example_packages/base/package/package_dialog.dart';
+
+/// Package values
+final packageJsonSerializable = PackageDialog(
+  key: 'json_serializable',
+  descEN: '''
+    Provides Dart Build System builders for handling JSON.
+    ''',
+  descRU: '''
+    Предоставляет Dart Build System System для обработки JSON.
+    ''',
+  messageEN: '''
+    This is a platform independent plugin used in this application in the demo 
+    of the freezed plugin.
+    ''',
+  messageRU: '''
+    Это плагин независимый от платформы, используется в этом приложении в 
+    демострации работы плагина freezed.
+    ''',
+  version: '6.6.1',
+  isPlatformDependent: false,
+);
diff --git a/example/lib/packages/packages.dart b/example/lib/packages/packages.dart
index 4505280..8abef57 100644
--- a/example/lib/packages/packages.dart
+++ b/example/lib/packages/packages.dart
@@ -4,6 +4,7 @@
  */
 import 'package:flutter_example_packages/base/package/package.dart';
 import 'package:flutter_example_packages/packages/battery_plus/package.dart';
+import 'package:flutter_example_packages/packages/build_runner/package.dart';
 import 'package:flutter_example_packages/packages/cached_network_image/package.dart';
 import 'package:flutter_example_packages/packages/cupertino_icons/package.dart';
 import 'package:flutter_example_packages/packages/dartz/package.dart';
@@ -14,9 +15,12 @@ import 'package:flutter_example_packages/packages/flutter_local_notifications/pa
 import 'package:flutter_example_packages/packages/flutter_markdown/package.dart';
 import 'package:flutter_example_packages/packages/flutter_secure_storage/package.dart';
 import 'package:flutter_example_packages/packages/freezed/package.dart';
+import 'package:flutter_example_packages/packages/freezed_annotation/package.dart';
 import 'package:flutter_example_packages/packages/get_it/package.dart';
 import 'package:flutter_example_packages/packages/google_fonts/package.dart';
 import 'package:flutter_example_packages/packages/intl/package.dart';
+import 'package:flutter_example_packages/packages/json_annotation/package.dart';
+import 'package:flutter_example_packages/packages/json_serializable/package.dart';
 import 'package:flutter_example_packages/packages/package_info_plus/package.dart';
 import 'package:flutter_example_packages/packages/path_provider/package.dart';
 import 'package:flutter_example_packages/packages/photo_view/package.dart';
@@ -37,6 +41,7 @@ import 'flutter_keyboard_visibility/package.dart';
 /// List app packages
 final packages = <Package>[
   packageBatteryPlus,
+  packageBuildRunner,
   packageCachedNetworkImage,
   packageCrypto,
   packageCupertinoIcons,
@@ -49,9 +54,12 @@ final packages = <Package>[
   packageFlutterMarkdown,
   packageFlutterSecureStorage,
   packageFreezed,
+  packageFreezedAnnotation,
   packageGetIt,
   packageGoogleFonts,
   packageIntl,
+  packageJsonAnnotation,
+  packageJsonSerializable,
   packagePackageInfoPlus,
   packagePathProvider,
   packagePhotoView,
diff --git a/example/pubspec.lock b/example/pubspec.lock
index 86f1094..84df1d0 100644
--- a/example/pubspec.lock
+++ b/example/pubspec.lock
@@ -466,14 +466,14 @@ packages:
     source: sdk
     version: "0.0.0"
   freezed:
-    dependency: "direct main"
+    dependency: "direct dev"
     description:
       name: freezed
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.3.3"
   freezed_annotation:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: freezed_annotation
       url: "https://pub.dartlang.org"
@@ -557,12 +557,19 @@ packages:
     source: hosted
     version: "0.6.4"
   json_annotation:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.8.0"
+  json_serializable:
+    dependency: "direct dev"
+    description:
+      name: json_serializable
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.6.1"
   lints:
     dependency: transitive
     description:
@@ -896,6 +903,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.2"
+  source_helper:
+    dependency: transitive
+    description:
+      name: source_helper
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.3"
   source_span:
     dependency: transitive
     description:
diff --git a/example/pubspec.yaml b/example/pubspec.yaml
index af63cbf..f881644 100644
--- a/example/pubspec.yaml
+++ b/example/pubspec.yaml
@@ -38,8 +38,6 @@ dependencies:
   photo_view: ^0.14.0
   ## https://pub.dev/packages/dartz
   dartz: ^0.10.1
-  ## https://pub.dev/packages/freezed
-  freezed: ^2.3.3
   ## https://pub.dev/packages/provider
   provider: ^6.0.5
   ## https://pub.dev/packages/equatable
@@ -52,6 +50,10 @@ dependencies:
   translator: ^0.1.7
   ## https://pub.dev/packages/flutter_markdown
   flutter_markdown: ^0.6.15
+  ## https://pub.dev/packages/freezed_annotation
+  freezed_annotation: ^2.2.0
+  ## https://pub.dev/packages/json_annotation
+  json_annotation: ^4.8.0
 
   ## https://os-git.omprussia.ru/non-oss/flutter/flutter-plugins/-/tree/master/packages/xdga_directories
   xdga_directories:
@@ -145,8 +147,14 @@ dev_dependencies:
   flutter_test:
     sdk:
       flutter
+  ## https://pub.dev/packages/flutter_lints @todo
   flutter_lints: ^2.0.0
+  ## https://pub.dev/packages/build_runner
   build_runner: ^2.3.3
+  ## https://pub.dev/packages/freezed
+  freezed: ^2.3.3
+  ## https://pub.dev/packages/json_serializable
+  json_serializable: ^6.6.1
 
 flutter:
   generate: true