Convert single images and/or whole directories containing valid image formats

Command-line image resizer and rotator for JPEG and PNG images.
More information: <https://github.com/jarun/imgp>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

imgp -x {{1366x1000}} {{path/to/directory}} {{path/to/file}}

click the source code to copy install imgp on any operating system with command-not-found.com