Guetzli made easy! One click that stands between you and your Guetzli JPEG :) Batch convert supports multi-thread encoding.
Guetzli Converter is a simple GUI of the command line tool Guetzli developed by Google. You can find the official project on Github: https://github.com/google/guetzli
Guetzli Converter just simplify the process of creating a Guetzli encoded JPEG by providing a graphical interface.
Guetzli Converter's batch processing make it possible to run Guetzli multi-thread. Unlocking you much more performance if you have a bunch of files to convert.
Java source of a Guetzli Converter GUI done by polygOnetic
Compiled binaries can be found here: https://www.guetzliconverter.net/