- https://placekitten.com/
Placekitten provides you with placeholder images of cute kittens. You can even specify the height and width of the image via the links for the placeholder. - http://www.fillmurray.com/
The same as above but with pictures of Bill Murray. - http://www.placecage.com/
With this placeholder service you can get images of Nicolas Cage. You can even specify the type of image you want to get (Calm, Gray, Crazy, GIF)
