diff --git a/cbrtocbz.py b/cbrtocbz.py
index b3a7f1e..d51ceda 100644
--- a/cbrtocbz.py
+++ b/cbrtocbz.py
@@ -1,3 +1,59 @@
 import rarfile
 import zipfile
+import argparse
+import tempfile
+from sys import argv
+from os import curdir, remove, walk
+from os.path import splitext, join
+#from glob import glob
+from typing import Final
 
+#optionally prints a message if the verbosity level is high enough
+def vprint(text, level=0):
+    if vprint.verbosity >= level:
+        print(text)
+vprint.verbosity = 0
+
+def add_files(zip: zipfile.ZipFile, directory):
+    for dirpath, dirs, files in walk(directory):
+        for f in files:
+            path = join(dirpath, f)
+            vprint('writing ' + path, 2)
+            zip.write(path)
+        for d in dirs:
+            path = join(dirpath, d)
+            add_files(zip, path)
+
+def main(arguments):
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-e', '--ext', type=str)
+    parser.add_argument('-p', '--path', type=str)
+    parser.add_argument('-d', '--delete', action='store_true')
+    parser.add_argument('-v', action='count')
+    parser.add_argument('files', nargs='+', type=str)
+    args = parser.parse_args(arguments)
+    files = args.files
+    ext = args.ext or 'cbz'
+    delete = args.delete
+    path: Final = args.path or curdir
+
+
+    for f in files:
+        with tempfile.TemporaryDirectory() as dir:
+            vprint('created temp dir ' + dir, 1)
+            with rarfile.RarFile(f, 'r') as rar:
+                vprint('extracting ' + f, 1)
+                rar.extractall(dir)
+                z_f = join(path, splitext(f)[0] + '.' + ext)
+                with zipfile.ZipFile(z_f, 'x') as zip:
+                    for dirpath, dirs, files in walk(dir):
+                        for file in files:
+                            p = join(dirpath, file)
+                            zip.write(p)
+                vprint('finished ' + z_f, 0)
+            if delete:
+                vprint('deleting ' + f, 0)
+                remove(f)
+
+if __name__ == '__main__':
+    main(argv[1:])