The image optimizer plugin is meant to compress and reduce the size of JPG, JPEG, PNG & GIF user file uploads for better performance & size reduction.
The plugin is compatible with 66uptime, 66qrcode, 66vcard, 66qrmenu, 66biolinks products (latest versions).

The installation is extremely easy.
You simply need to download the files, unzip the package and then copy the "image-optimizer" folder inside of your plugins folder of the main product installation.
After that, you can go inside of your admin panel, go to the Plugins management section and enable your new plugin.

This plugin uses a free and public API from resmush.it to do all the heavy lifting of the image optimization process. This API currently supports images under 5MB, JPG, JPEG, GIF, and PNG.
If this API fails for some reason, a default and basic PHP image optimization process is used to try and compress JPG, JPEG, and GIF images.