I created a little web page (<10kB) that generates a random 4K (3840*2160px) wallpaper image using Javascript and the <canvas> element. Right-click to save the image (desktop only for now).
No two images are the same. You may need a few refreshes to get an interesting result.
No two images are the same. You may need a few refreshes to get an interesting result.
Code: https://github.com/roytanck/wallpaper-generator