diff --git a/rename_chapter.py b/rename_chapter.py
new file mode 100644
index 0000000..7cfa1bc
--- /dev/null
+++ b/rename_chapter.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+
+import os
+import re
+import time
+import argparse
+import mandown
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="Rename Webtoon CBZ files using mandown metadata."
+    )
+    parser.add_argument(
+        "--folder", required=True, help="Path to the folder containing CBZ files."
+    )
+    parser.add_argument("--url", required=True, help="Webtoon series URL.")
+    parser.add_argument(
+        "--series", required=True, help="Series name (e.g., 'Tower of God')."
+    )
+    parser.add_argument(
+        "--dry-run",
+        action="store_true",
+        help="Only print planned renames, do not modify files.",
+    )
+
+    args = parser.parse_args()
+    folder_path = args.folder
+    url = args.url
+    series_name = args.series
+    dry_run = args.dry_run
+
+    print("Fetching metadata with mandown...")
+    series = mandown.get(url)
+    chapters = {int(ch.slug.split(".")[0]): ch.title for ch in series.chapters}
+
+    for filename in os.listdir(folder_path):
+        match = re.search(r"epNo(\d+)", filename)
+        if not match:
+            continue
+        ep_no = int(match.group(1))
+
+        if ep_no not in chapters:
+            print(f"[!] Episode {ep_no} not found in metadata, skipping.")
+            continue
+
+        chapter_title = chapters[ep_no]
+        safe_title = re.sub(r'[\\/:"*?<>|]+', "", chapter_title)
+        new_name = f"{series_name} - Chapter {ep_no} - {safe_title}.cbz"
+
+        src = os.path.join(folder_path, filename)
+        dst = os.path.join(folder_path, new_name)
+
+        if dry_run:
+            print(f"[DRY-RUN] Would rename: {filename} -> {new_name}")
+        else:
+            os.rename(src, dst)
+            print(f"Renamed: {filename} -> {new_name}")
+
+        time.sleep(0.1)  # optional delay
+
+
+if __name__ == "__main__":
+    main()