Quote:
Originally Posted by senhal
I'd like a plugin which let me validate epubs using epubcheck.
Actually I'm using epubchecker, but it would be easier to check ebooks inside Calibre.
Obviously, I Know that Calibre Editor has its own (and really good) validation, but it works in a different way and I need them both.

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There's a very simple solution. Use Calibre's open with to open the ePub with EPUB-Checker and it will open with the ePub and check it.