Pixelhunter.io - Free AI image resizing tool for social media
Landscape by Sprout Social - An interactive tool for social media image resizing
Pingo - Optimize images for the web quickly 🖼️⚡
OG IMPACT - A free, open source API for generating social media images
Promo Instant Image Resizer - Automatically optimize images for web & social media (free!)
Bannerbear - Auto-generate IG Stories, Pinterest Pins and more