YouTube Thumbnails Maker
Canva makes some awesome templates to catch peoples attention.
On Facebook there has been a lot of advertisements on creating Thumbnails images from YouTube videos. This is a paid online service - you can't try it out before you buy.
Fear not, you don't have to purchase an unknown service when there's Canva YouTube Templates.
There are 200+ premade quality designs available. Everything can be customized to your needs and audience's attention. You'll certainly find a design that will make your video stand out.
You don't need to subscribe to Canva to use it. As a basic user, you have a lot of options. If you love it, you may want to subscribe to get access to a lot more templates and design elements.
https://www.canva.com/youtube-thumbnails/templates
Check out Canva YouTube thumbnail templates before you invest in Thumbnail Blaster!