diff --git a/nocodetools/serializers.py b/nocodetools/serializers.py
new file mode 100644
index 0000000..293b271
--- /dev/null
+++ b/nocodetools/serializers.py
@@ -0,0 +1,67 @@
+from rest_framework import serializers
+from .models import Code, Page, Element
+
+# from datetime import datetime, timezone
+
+from django.utils import timezone
+# from zoneinfo import ZoneInfo 
+
+# KST = ZoneInfo("Asia/Seoul")
+
+class ElementSerializer(serializers.Serializer):
+    element_id = serializers.CharField(required=False)
+    element_type = serializers.CharField()
+    content = serializers.CharField(allow_blank=True)
+    css = serializers.DictField()
+
+class PageSerializer(serializers.Serializer):
+    cut = serializers.IntegerField()
+    elements = ElementSerializer(many=True)
+
+class CodeSerializer(serializers.Serializer):
+    id = serializers.SerializerMethodField()
+    pages = PageSerializer(many=True, required=False)
+    created_at  = serializers.SerializerMethodField()
+    updated_at  = serializers.SerializerMethodField()
+
+    def get_created_at(self, obj):
+        return timezone.localtime(obj.created_at).isoformat(timespec="seconds")
+
+    def get_updated_at(self, obj):
+        return timezone.localtime(obj.updated_at).isoformat(timespec="seconds")
+
+    def get_id(self, obj):
+        return str(obj.id)
+
+    def create(self, validated_data):
+        pages_data = validated_data.pop('pages')
+        pages = [
+            Page(
+                cut=page['cut'],
+                elements=[Element(**el) for el in page['elements']]
+            ) for page in pages_data
+        ]
+        code = Code(pages=pages, **validated_data)
+        code.save()
+        return code
+
+    def update(self, instance, validated_data):
+        update_pages_data = validated_data.get('pages', [])
+        existing = {p.cut: p for p in instance.pages}
+        
+        for page in update_pages_data:
+            cut = page.get('cut')
+            if cut and cut in existing:
+                page_obj = existing[cut]
+                page_obj.elements = [Element(**el) for el in page["elements"]]
+            
+            else:
+                instance.pages.append(
+                    Page(
+                    cut=cut,
+                    elements=[Element(**el) for el in page["elements"]]
+                    )
+                )
+
+        instance.save()
+        return instance