How to Make Pure CSS Pixel Art Video
This video has an accompanying full text tutorial. https://codeworkshop.dev/blog/2020-08-09-pixel-art-with-css-box-shadows/
Learn a neat technique for drawing pixel art on the web with nothing but a little CSS and a single div element.
Command Line Tool to Convert PNG files to CSS pixel art class.
https://www.npmjs.com/package/pixel-to-css