Pixelhunter.io - Free AI image resizing tool for social media
Promo.com - Every promotion starts with Promo.com.
ImageKit.io - Instant multi-platform image optimization
Resizing.app - Image resizing has never been so simple with free online resizing.app. Convert, optimize, resize images with ease and for absolutely free.
SproutSocial - Sprout Social is a social media management tool created to help businesses find new customers & grow their social media presence. Try it for free.
Squash 2 for Mac - The easiest way to compress and optimize images for the web