diff --git a/mnemo_cards_backend/lib/api/v2/extensions/game_card_extensions.dart b/mnemo_cards_backend/lib/api/v2/extensions/game_card_extensions.dart
new file mode 100644
index 0000000..ccc7b04
--- /dev/null
+++ b/mnemo_cards_backend/lib/api/v2/extensions/game_card_extensions.dart
@@ -0,0 +1,39 @@
+import 'package:mnemo_cards_backend/database/database.dart';
+import 'package:mnemo_cards_common/mnemo_cards_common.dart';
+
+/// Extension для конвертации GameCard в GameCardDto для admin API
+extension GameCardAdminExtension on GameCard {
+  /// Конвертация GameCard в GameCardDto с учетом packId и конвертации изображений
+  GameCardDto toGameCardDtoWithPack(
+    String? packId,
+    String? Function(String?, String?, String) convertImageToUrl,
+    String? Function(String?, String?, String) convertImageBackToUrl,
+  ) {
+    return GameCardDto(
+      id: id,
+      original: original,
+      translation: translation,
+      mnemo: mnemo ?? '',
+      image: convertImageToUrl(image, packId, id),
+      imageBack: convertImageBackToUrl(imageBack, packId, id),
+      back: back,
+      transcription: transcription ?? '',
+      transcriptionMnemo: transcriptionMnemo,
+    );
+  }
+
+  /// Простая конвертация GameCard в GameCardDto без конвертации изображений
+  GameCardDto toGameCardDto() {
+    return GameCardDto(
+      id: id,
+      original: original,
+      translation: translation,
+      mnemo: mnemo ?? '',
+      image: image,
+      imageBack: imageBack,
+      back: back,
+      transcription: transcription ?? '',
+      transcriptionMnemo: transcriptionMnemo,
+    );
+  }
+}
diff --git a/mnemo_cards_backend/lib/api/v2/extensions/voice_extensions.dart b/mnemo_cards_backend/lib/api/v2/extensions/voice_extensions.dart
new file mode 100644
index 0000000..171483b
--- /dev/null
+++ b/mnemo_cards_backend/lib/api/v2/extensions/voice_extensions.dart
@@ -0,0 +1,16 @@
+import 'package:mnemo_cards_backend/database/database.dart';
+import 'package:mnemo_cards_common/mnemo_cards_common.dart';
+
+/// Extension для конвертации VoiceModel в AdminVoiceResponse
+extension VoiceModelAdminExtension on VoiceModel {
+  /// Конвертация VoiceModel в AdminVoiceResponse
+  AdminVoiceResponse toAdminVoiceResponse() {
+    return AdminVoiceResponse(
+      id: id,
+      cardId: cardId,
+      voiceUrl: voiceUrl,
+      language: language,
+      createdAt: createdAt.dateTime.toIso8601String(),
+    );
+  }
+}