A Web-Based Tool For Resizing/Retouching Social Media Images
Social networks allow users to customize how their profiles appear with avatars, backgrounds, cover images, etc.
Social Media Image Maker is a free, web-based tool that eases creating and editing these images.
The tool informs us with the required image dimensions for each service (Twitter, Facebook, YouTube, Flickr and more) and allows uploading any image + resizing or cropping them to fit the size.
Simply, from a single interface, it is possible to create social images for all major networks without the need to learn the requirements for each.