Thread: Why can't I upload an epub3 book to my Kobo Forma?
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Old 03-24-2020, 07:51 PM   #10
davidfor
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Quote:
Originally Posted by droopy View Post
How can I prevent my Calibe from auto-converting epub3 files into kepub, while still autoconverting epub2 into kepub?
You can't. And you probably don't want to. If you really want to use as many epub3 features as Kobo supports, you want the book as an kepub. If you use the extended driver to transform the book to kepub, it doesn't matter whether the input is epub2 or epub3. The output will not change that. And the kepub renderer will respect the epub version.

If you want to use some books as epubs (of either version) or some as kepubs, then don't use the extended driver. For the books you want to read as kepubs, do a conversion in calibre. The default configuration for the built-in KoboTouch driver is to send kepubs if they are available before epubs.

But, overall, most people choose one format or the other and stick to it. And it comes down to either wanting the extra function a kepub supplies, or wanting to avoid the formatting differences.
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