Social media platforms are forever changing the image sizes and formats Keep up to date! https://makeawebsitehub.com/social-media-image-sizes-cheat-sheet/
You can do basic image editing in the WordPress admin area. This includes image cropping, rotating, scaling image sizes, and flipping them vertically or horizontally.
Meet Icecream Image Resizer, an application designed to help you resize your images quickly and conveniently. Add multiple files and even whole folders with photos and resize them in seconds. Just select the destination folder and simply click the “Resize” button! The tool supports all major graphic formats such as JPEG, JPG, PNG, BMP and TIFF. You can also set the desired width and height values either manually or using presets while retaining the original aspect ratio if desired.
Easily crop, resize, and edit your images online for FREE at PicResize