alphapng
Very minimal cli tool to separate alpha and rgb channels from a transparent png file. RGB channels will be saved in a compressed jpg file and Alpha channel in a simplified Png. It can be used to reduce image size if you can programmatically combine the channels later (in canvas for an example).
Installation
npm install alphapng -g
Usage
From terminal or npm script.
Usage: alphapng png Params: png input png file to process Options: -h, --help show help -v, --version show version -f, --filename name of the new png and jpg -q, --quality jpg compression quality