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

We use imgproxy which does 2->4 and all you need to do is change the URL on your site. Source: 6 months ago

You should also be using a variety of formats. Unless you need support for old browsers and transparency in the same image, don't use PNG. Stick with jpg, webp and avif. You can setup something like imgproxy to automatically resize and change format of images, or even fit into the space requirements you set. Source: about 1 year ago

If you look for something universal, you can try API for image optimization (e.g. imgproxy). However, the mechanism is different from build-time optimization. Source: about 1 year ago

Now signup for Vultr and make a $5 instance and put imgproxy on it. Setup a subdomain for images in Cloudflare and point it to the imgproxy IP. Source: over 1 year ago

If you need optimization done en masse on the website, I would recommend https://imgproxy.net/. Source: over 1 year ago