Thumper - fast mass image thumbnail generator
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Thumper - fast mass image thumbnail generator

Thumper is a scriptable, command-line tool to generate thumbnails of large batches of images. Compared to other tools, Thumper's distinct advantage is to fully leverage multiple CPU cores; if run on a machine with N available cores, it will run up to N times faster than on a single-core, single-CPU machine.

Thumper was originally created for the Advanced Python Newsletter, to demonstrate Python's multiprocessing module.


Created by Aaron Maxwell, author of the Advanced Python Newsletter. Reach him at


Thumper's source code is in the public domain.