Samuel Diethelm

Lightweight plugin to use remote images for post thumbnails and featured image. Enter remote image url into custom field ‘remote_thumbnail’ of any post.
Images will not be downloaded, therefore will not use up space from your hosting. In order to keep the same aspect ratio as an uploaded, cropped image with no distortion, the code generated will be an inline-block DIV with the image set as a background.

Remote Thumbnail

Lightweight plugin to use remote images for post thumbnails and featured image. Enter remote image url into custom field 'remote_thumbnail'  …

mrtaiw

Using external images from anywhere to make thumbnail.
If empty url image, will take the first picture in the post as thumbnail
<h3>Support</h3>
Having problems or need support? Feel free to email mrtaiw@gmail.com or Facebook https://www.facebook.com/taiw96

External Thumbnail

Using external images from anywhere to make thumbnail

Remote Thumbnail vs External Thumbnail