Pillow (PIL Fork) Create JPEG thumbnails from __future__ import print_function import os, sys from PIL import Image size = (128, 128) for infile in sys.argv[1:]: outfile = os.path.splitext(infile)[0] + ".thumbnail" if infile != outfile: try: im = Image.open(infile) im.thumbnail(size) im.save(outfile, "JPEG") except IOError: print("cannot create thumbnail for", infile)