Quote:...I often have to export within certain file size limitations.
Generally
file size = the size of the file in bytes when exported to disk.
If you mean the dimension of the image then using image size (width x height) is less ambiguous.
Edit: This goes part way. A plug-in that will export a copy at a reduced size that the user sets.
https://github.com/akkana/gimp-plugins/b...r/saver.py
Edit again: Some time since I tried this, but if the scaled image name is the same as the original image name, then the plugin first exports the full image size followed by the scaled image overwriting the original. Dangerous but does what you want.