I built a simple (and free) YouTube thumbnail downloader

Hi HN! I just created a super simple, free tool for downloading thumbnails from YouTube videos and Shorts. Paste a link, pick the size, and instantly grab any thumbnail—no sign-up, no hassle.

Would love any feedback or suggestions on how to make it better!

Check it out here: https://ytb2mp4.com/youtube-thumbnail-downloader

Thanks!