A simple placeholder image service, based on the amazing Keanu Reeves.
If you want a cute placeholder of a sweet little kitty, then Place Kitten is the tool you are looking for. It is easy-peasy to use, you just need to write the size you need after the Placekitten URL and you get it. In case you want a specific picture of theirs, you can request it with the image number and the size you want it. Done!