hello,
a friend of my made a routine that converts a html content with linked images to a base 64 format. Just copy/cut the html text into the clipboard, run the conversion and you can paste it back. So you can always see the picture without having access to the internet and when the source disappears the image is still there.
When creating a catalog calibre the bae 64 is again converted to a jpg, but at least you do not have to worry about broken links
<div><p align="center"> </p> <p align="center"><img src="
http://www.linkadress.be/test.jpg " title=" width=145" height="190"> </p><hr>
I was very happy with this - hope you can use it as well !