Here’s a set of more than 150 SVG pixel-art icons I made as a side project.
It’s quite challenging to recreate some objects within 9×9 blocks (eg. the gear icon) but they are fun to make. You can see how I made them here: Creating a Pixel Art Icon of a Panda, but my process has improved a lot since I wrote a Python script to optimise the lines; at least I don’t need to remove extra indices one-by-one anymore.
I have also created a page for everyone to explore and download, feel free to use as you want!
Download: sqkhor.com/pixel-icons
GitHub: github.com/shuqikhor/PixelIcon/