Cloudinary automatically optimizes generated JPG and PNG images to reduce size (http://support.cloudinary.com/entries/23493267-Does-Cloudinary-optimize-or-smush-images-)
When uploading an image to Cloudinary, it is stored as is in your account.
Here's an uploaded image:
The original file's size is ~200KB, therefore clicking its link (http://res.cloudinary.com/demo/image/upload/couple.jpg) will deliver the original as is.
However, Optimization is auto performed by Cloudinary with any transformation.
For example, the following same dimension (100%) transformation creates an optimized ~40KB JPG of the same image instead of ~200KB:
If you choose to, you can apply an incoming transformation for optimizing before storing in the cloud (e.g., using
a_exif to automatically rotate the image according to its EXIF data).