Not sure what image size on FB you need pero try mo magresize here. May edit function to zoom-crop into the section you want. Source: almost 2 years ago

To design your images, you can use Canva, paired with an Image Resizer if you don't have access to Canva Pro and need to tweak the size of the picture. - Source: dev.to / about 2 years ago

Have you tried online tools like https://promo.com/tools/image-resizer? Source: over 2 years ago

Not sure how to do it in photoshop but you can try this free tool to do just that. LMK if it works for you. https://promo.com/tools/image-resizer/. Source: over 2 years ago

There is also JPEG View which is really fast and simple image viewer for windows https://github.com/sylikc/jpegview) It is very fast, specially noticeable on very large images. - Source: Hacker News / 2 months ago

JPEGView - lightweight image viewer for Windows. ShareX - screen capture tool with other nice features. Source: almost 2 years ago

JPEGView should be close enough to what you want. It's very light-weight. Source: almost 2 years ago

JPEGView is great, lightweight and opens stuff fast https://sourceforge.net/projects/jpegview/. Source: about 2 years ago

JPEGView - Lean and fast image viewer with minimal GUI. Source: about 2 years ago