I made a web app that makes it easy to download thumbnails for YouTube videos. It’s called Get YouTube Thumbnails.
When you submit a YouTube URL, you get back the image, a link to that image, and the original height and width of that image (even if it's scaled down on your screen size).
You can also download the image with a YouTube play logo overlaid on the top.
This is useful when you want to link to a YouTube video and you can't or don't want to embed a video. This might be:
- in emails
- in presentation slides (PowerPoint etc)
- in websites where you want to minimise data transfers
Let me know if you find it useful!