Comment by sillystuff
2 years ago
Maybe a little less hassle than using some web thingy. Ebook-convert is a cli application that comes with Calibre, and is probably what the online sites are using anyway.
ebook-convert infilename.epub outfilename.epub
If I get an ebook that works with fbreader, but has issues on my nook, the above will fix it.
The "online site"/"web thingy" linked in another comment is
1. like 300 lines of code <https://github.com/innocenat/kindle-epub-fix/blob/master/scr...>
2. runs entirely in the browser and isn't using Calibre scripts or anything else
3. could pretty easily be modified into a downloadable program that runs from both the command-line or something that you can open in your browser