Online YouTube thumbnail grabber | BoingBoing

You’ll will find this is one great online tool for generating YouTube thumbnails for your videos review post or as a ‘featured image’ attachment. Quick and easy, just paste YouTube url in the input textfield and the page will grab and display all thumbnail sizes and resolutions to choose from. You can directly copy the image address or save it on your computer. - https://den-i.com/online-youtube-thumbnail-grabber-boingboing/