img2data
A Node.js command-line utility to convert images to data URIs.
https://www.npmjs.com/package/img2data
Supported image formats: png | gif | jpg | jpeg | svg
Installation
npm install img2data -g
Usage
$ img2data img1.png img2.jpg img3.jpeg img4.gif img5.svg > output.css$ img2data -a > output.css
Output Example: