diff --git a/tools/resize_images_to_resolution.py b/tools/resize_images_to_resolution.py
new file mode 100644
index 00000000..cdc35640
--- /dev/null
+++ b/tools/resize_images_to_resolution.py
@@ -0,0 +1,98 @@
+import os
+import cv2
+import argparse
+import shutil
+import math
+
+
+def resize_images(src_img_folder, dst_img_folder, max_resolution="512x512", divisible_by=2, interpolation=None, save_as_png=False):
+  # Split the max_resolution string by "," and strip any whitespaces
+  max_resolutions = [res.strip() for res in max_resolution.split(',')]
+
+  # # Calculate max_pixels from max_resolution string
+  # max_pixels = int(max_resolution.split("x")[0]) * int(max_resolution.split("x")[1])
+
+  # Create destination folder if it does not exist
+  if not os.path.exists(dst_img_folder):
+    os.makedirs(dst_img_folder)
+
+  # Select interpolation method
+  if interpolation == 'lanczos4':
+    cv2_interpolation = cv2.INTER_LANCZOS4
+  elif interpolation == 'cubic':
+    cv2_interpolation = cv2.INTER_CUBIC
+  else:
+    cv2_interpolation = cv2.INTER_AREA
+
+  # Iterate through all files in src_img_folder
+  img_exts = (".png", ".jpg", ".jpeg", ".webp", ".bmp")                   # copy from train_util.py
+  for filename in os.listdir(src_img_folder):
+    # Check if the image is png, jpg or webp etc...
+    if not filename.endswith(img_exts):
+      # Copy the file to the destination folder if not png, jpg or webp etc (.txt or .caption or etc.)
+      shutil.copy(os.path.join(src_img_folder, filename), os.path.join(dst_img_folder, filename))
+      continue
+
+    # Load image
+    img = cv2.imread(os.path.join(src_img_folder, filename))
+
+    for max_resolution in max_resolutions:
+      # Calculate max_pixels from max_resolution string
+      max_pixels = int(max_resolution.split("x")[0]) * int(max_resolution.split("x")[1])
+
+      # Calculate current number of pixels
+      current_pixels = img.shape[0] * img.shape[1]
+
+      # Check if the image needs resizing
+      if current_pixels > max_pixels:
+        # Calculate scaling factor
+        scale_factor = max_pixels / current_pixels
+
+        # Calculate new dimensions
+        new_height = int(img.shape[0] * math.sqrt(scale_factor))
+        new_width = int(img.shape[1] * math.sqrt(scale_factor))
+
+        # Resize image
+        img = cv2.resize(img, (new_width, new_height), interpolation=cv2_interpolation)
+      else:
+        new_height, new_width = img.shape[0:2]
+
+      # Calculate the new height and width that are divisible by divisible_by (with/without resizing)
+      new_height = new_height if new_height % divisible_by == 0 else new_height - new_height % divisible_by
+      new_width = new_width if new_width % divisible_by == 0 else new_width - new_width % divisible_by
+
+      # Center crop the image to the calculated dimensions
+      y = int((img.shape[0] - new_height) / 2)
+      x = int((img.shape[1] - new_width) / 2)
+      img = img[y:y + new_height, x:x + new_width]
+
+      # Split filename into base and extension
+      base, ext = os.path.splitext(filename)
+      new_filename = base + '+' + max_resolution + ('.png' if save_as_png else '.jpg')
+
+      # Save resized image in dst_img_folder
+      cv2.imwrite(os.path.join(dst_img_folder, new_filename), img, [cv2.IMWRITE_JPEG_QUALITY, 100])
+      proc = "Resized" if current_pixels > max_pixels else "Saved"
+      print(f"{proc} image: {filename} with size {img.shape[0]}x{img.shape[1]} as {new_filename}")
+
+
+def main():
+  parser = argparse.ArgumentParser(
+      description='Resize images in a folder to a specified max resolution(s) / 指定されたフォルダ内の画像を指定した最大画像サイズ（面積）以下にアスペクト比を維持したままリサイズします')
+  parser.add_argument('src_img_folder', type=str, help='Source folder containing the images / 元画像のフォルダ')
+  parser.add_argument('dst_img_folder', type=str, help='Destination folder to save the resized images / リサイズ後の画像を保存するフォルダ')
+  parser.add_argument('--max_resolution', type=str,
+                      help='Maximum resolution(s) in the format "512x512,384x384, etc, etc" / 最大画像サイズをカンマ区切りで指定 ("512x512,384x384, etc, etc" など)', default="512x512,384x384,256x256,128x128")
+  parser.add_argument('--divisible_by', type=int,
+                      help='Ensure new dimensions are divisible by this value / リサイズ後の画像のサイズをこの値で割り切れるようにします', default=1)
+  parser.add_argument('--interpolation', type=str, choices=['area', 'cubic', 'lanczos4'],
+                      default='area', help='Interpolation method for resizing / リサイズ時の補完方法')
+  parser.add_argument('--save_as_png', action='store_true', help='Save as png format / png形式で保存')
+
+  args = parser.parse_args()
+  resize_images(args.src_img_folder, args.dst_img_folder, args.max_resolution,
+                args.divisible_by, args.interpolation, args.save_as_png)
+
+
+if __name__ == '__main__':
+  main()