Thanks all for your suggestions.
My main concern is to do that on all my epub files in one time and not one by one
I tried to explore the zip solution:
- I add a new extension (.zip) to all my epub files (one click with the right software)
- Now all epub files are seen as zip folder by Windows and I can navigate inside as if it is simple folder.
Next step is to find the way to resize pictures (batch mode) inside these “zip” folders.
I tried without success: Photoshop, ACD See, Faststone (MaxViewer, Viewer & Resize).
Next try with Fotosizer.
Any others ideas?
A simple question but no a so easy answer