CDN for image optimization

Content Delivery Networks (CDNs) are a great way to speed up your images. But some of them (called image CDN) can also optimize and change your images along the way, serving exactly what your users need.

When choosing between image CDNs, you want to compare the options from the perspective of the following features:

• Whether they provide on-the-fly optimizations like resizing, quality and format adjustments, and additional features.
• The use of client-side JS (they'd better not, for performance, UX, and SEO reasons).
• The infrastructure they're based on (which parent CDN is used is very important for speed; Akamai would be the perfect option).

Uploadcare is a perfect option. You can read, in detail, how our image optimization service works . It also provides a complete list of image optimizations that you can try to implement using any other service.