YouTube Thumbnail Grabber - Paste in a YouTube video url, get the thumbnail in all sizes.
Get YouTube Thumbnail - Easy way to get the thumbnail image from a YouTube video
YT Thumbnail Downloader - YT Thumbnail Downloader is a browser extension that allows you to download YouTube video previews or thumbnails in high quality.
Thumbnail Grabber - Thumbnail Grabber is an online tool that allows you to download thumbnails from a YouTube video.
Fbutube.com - Fbutube.com is an online YouTube thumbnail downloader that you can use to extract the video preview images from a YouTube video.
Y2Img.xyz - It is a YouTube Thumbnail Downloader/Grabber which can help you to download YouTube Thumbnail for free in High Quality like 4K, 1080p, 720p, 480p and 320p etc.