diff --git a/src/optima35/core.py b/src/optima35/core.py
index 623d274..a885a5c 100644
--- a/src/optima35/core.py
+++ b/src/optima35/core.py
@@ -13,8 +13,8 @@ class OptimaManager:
 
     def modify_timestamp_in_exif(self, data_for_exif: dict, filename: str):
             """"Takes a dict formated for exif use by piexif and adjusts the date_time_original, changing the minutes and seconds to fit the number of the filname."""
-            last_tree = filename[-3:len(filename)]
-            total_seconds = int(re.sub(r'\D+', '', last_tree))
+            last_three = filename[-3:len(filename)]
+            total_seconds = int(re.sub(r'\D+', '', last_three))
             minutes = total_seconds // 60
             seconds = total_seconds % 60
             time = datetime.strptime(data_for_exif["date_time_original"], "%Y:%m:%d %H:%M:%S") # change date time string back to an time object for modification
@@ -44,7 +44,6 @@ class OptimaManager:
         with self.image_processor.open_image(image_input_file) as img:
             processed_img = img
             image_name = os.path.basename(image_output_file) # for date adjustment
-
             # Resize
             if resize is not None:
                 processed_img = self.image_processor.resize_image(
@@ -79,7 +78,7 @@ class OptimaManager:
                 selected_exif = dict_for_exif
                 if "date_time_original" in dict_for_exif:
                     selected_exif = self.modify_timestamp_in_exif(selected_exif, image_name)
-                exif_piexif_format = self.exif_handler.build_exif_dict(
+                exif_piexif_format = self.exif_handler.build_exif_bytes(
                     selected_exif, self.image_processor.get_image_size(processed_img)
                 )
 
@@ -111,3 +110,22 @@ class OptimaManager:
                     )
             else:
                     return self.image_processor.convert_pil_to_qtimage(processed_img)
+
+    def insert_dict_to_image(self, exif_dict, image_path, gps = None):
+        image_name, ending = os.path.splitext(os.path.basename(image_path))
+        img = self.image_processor.open_image(image_path)
+        selected_exif = exif_dict
+        if "date_time_original" in exif_dict:
+            selected_exif = self.modify_timestamp_in_exif(selected_exif, image_name)
+
+        exif_piexif_format = self.exif_handler.build_exif_bytes(
+            selected_exif, self.image_processor.get_image_size(img)
+        )
+
+        # GPS data
+        if gps is not None:
+            latitude = float(gps[0])
+            longitude = float(gps[1])
+            exif_piexif_format = self.exif_handler.add_geolocation_to_exif(exif_piexif_format, latitude, longitude)
+
+        self.exif_handler.insert_exif(exif_dict = exif_piexif_format, img_path = image_path)
diff --git a/src/optima35/image_handler.py b/src/optima35/image_handler.py
index c42a66e..10232c2 100644
--- a/src/optima35/image_handler.py
+++ b/src/optima35/image_handler.py
@@ -103,7 +103,7 @@ class ExifHandler:
     def get_exif_info(self, image):
         return(piexif.load(image.info['exif']))
 
-    def build_exif_dict(self, user_data, imagesize):
+    def build_exif_bytes(self, user_data, imagesize):
         """Build a piexif-compatible EXIF dictionary from a dicts."""
         # Mostly made by ChatGPT, some adjustment
         zeroth_ifd = {
@@ -201,3 +201,7 @@ class ExifHandler:
             return exif_data
         except Exception as e:
             print(f"Error: {str(e)}")
+
+    def insert_exif(self, exif_dict, img_path):
+        exif_bytes = piexif.dump(exif_dict)
+        piexif.insert(exif_bytes, img_path)