Is there a way to compress base64 images?

Hi everyone

I use Stability AI to generate ideal customer avatars.

Stability AI returns images in the base64 format. Which is incredibly long and heavy.

I generated ~900 pictures, and they already take 2GB out of 3GB in my Xano workspace.

Am I missing any efficient way to convert/compress base64 images?

I send them to my Bubble app. So I am pretty flexible about what exactly I will send (URL, base64, something else)

Thank you!