Decode an image in base 64 to a file, using feeds, feeds tamper and jsonpath
Feeds Base64 images module

I have developed a module for this which adds two additional targets for file and image fields:


Filename
Base64


The 'Filename' target always needs to be mapped first.

I created this module years ago, but I never published it on drupal.org... until today!

https://www.drupal.org/sandbox/megachriz/2961717