As a designer myself I have faced a very time-consuming process of preparing my images for different social media platforms, so it looks nice and every part of an image is visible.
Every social media platform demands it’s own image sizes, otherwise the image will be cropped and some of important image parts could not be visible, or weirdly cropped.
A few days ago I find a web service called http://www.croptor.com which could be used to crop and resize images in a batch. It’s free to process 3 images at once, though you could purchase a paid plan for 9$ and process unlimited amount of images.
I think it very helpful and unique service, because there is no another way to do so. Photoshop, Figma, Affinity Designer don’t have such option to crop and resize images in a batch, also I’d like to point out that processed images have a very good quality thus having a sufficiently small size.

Anyway I think it will be useful tool to have for anyone who deals with an images and the good thing it is free to use.

You could check it here http://www.croptor.com