Uploadcare selects the best file format for each image and each client on the fly. For example, WebP for modern browsers and JPEG for older clients.
The /quality/smart/
command uses smart compression to achieve the smallest possible file without visual compromises. Or you can specify your own quality parameters, to take full control.
https://ucarecdn.com/
9a30b55f-c47f-498f-af6b-79f316e9e0da/
-/format/auto/
-/quality/smart/
You can replace smart with smart_retina
for higher resolution screens.