add code and readme.

json_string_to_object_node.py

@@ -0,0 +1,28 @@
+import json
+
+class JSONStringToObjectNode:
+    def __init__(self):
+        pass
+    
+    @classmethod
+    def INPUT_TYPES(s):
+        return {"required": {"json_string": ("STRING", {"multiline": True})}}
+    
+    RETURN_TYPES = ("JSON",)
+    FUNCTION = "convert_string_to_json"
+
+    def convert_string_to_json(self, json_string):
+        try:
+            json_object = json.loads(json_string)
+            return (json_object,)
+        except json.JSONDecodeError as e:
+            print(f"Error decoding JSON: {e}")
+            return (None,)
+
+NODE_CLASS_MAPPINGS = {
+    "JSONStringToObjectNode": JSONStringToObjectNode
+}
+
+NODE_DISPLAY_NAME_MAPPINGS = {
+    "JSONStringToObjectNode": "JSON String to Object"
+}