How Do I Convert Kobo Kindle Books To EPUB Format?

For a very direct, technical approach I usually do this: acquire the file from the vendor (Kobo often gives an EPUB/.kepub or an '.acsm' you open with Adobe Digital Editions; Kindle files are downloadable via Kindle for PC/Mac), then import into Calibre and convert to EPUB using Calibre’s conversion tool. If the book has DRM, conversion will fail, so the typical workaround involves a DRM removal step before conversion — tools and Calibre plugins exist for that, but laws and vendor terms can restrict use, so treat that option carefully and only for personal backups or accessibility reasons.

If you hit KFX problems from Kindle, there are specific plugins (like KFX Input) to let Calibre read KFX bundles; for Kobo’s '.kepub' you can convert straight in Calibre or strip the Kepub metadata if needed. Another less technical route is paid software like Epubor which bundles download/demux and conversion into one UI, useful if you don’t want to fiddle with plugins. Also remember: many publishers will provide alternate formats for accessibility requests, and public library apps (OverDrive/Libby) often supply EPUB files legally. Personally I prefer keeping a tidy folder of originals, converted EPUBs, and notes about what required extra steps, so I can re-run the process later without surprises.

Wow, this is one of my favorite little tech puzzles — converting between Kobo/Kindle formats and EPUB is totally doable, but there are a few hoops depending on where the book came from.

First, check whether the file you have is already an EPUB. Kobo store purchases typically deliver EPUB (or a Kobo-flavored '.kepub') which you can get by downloading via the Kobo website or the Kobo Desktop app. If you see an '.acsm' file instead, open it in Adobe Digital Editions (ADE) after authorizing ADE with your Adobe ID; ADE will create the DRM-protected EPUB in its Documents folder. For Kindle purchases, files are often '.azw', '.azw3', '.kfx' or '.mobi' — newer Kindle formats like KFX are trickier and usually require grabbing the files through Kindle for PC/Mac.

If the files are DRM-free, the easiest route is Calibre. I install Calibre, add the book, and then choose 'Convert books' → target EPUB. If the files are DRM-protected, you’ll hit a wall unless you remove DRM; that’s a legal grey area in many places and may violate terms of service, so I only do that for books I legitimately own and need for personal backup or reading on my preferred device. For DRM removal, community plugins exist (DeDRM, KFX Input for Calibre), and for Kobo you can often avoid heavy lifting by getting the EPUB through ADE first. Lastly, always keep backups of original files, and consider contacting the store/publisher for an EPUB if you bought the book and want a different format — they sometimes help out.

Okay, quick practical way I handle this when I want an EPUB on my tablet: start by figuring out the source. If it’s from Kobo, I log into my Kobo account on the web or open Kobo Desktop and download the book; often Kobo gives an EPUB or '.kepub' file. If it’s an '.acsm' file, I open it with Adobe Digital Editions (which needs my Adobe ID) and that produces a protected EPUB I can then import to Calibre.

For Kindle purchases the workflow is different — I use Kindle for PC/Mac to download the book files to my computer (older versions save non-KFX files which are easier to convert). Then I import them into Calibre. Calibre can convert many formats straight to EPUB, but DRM blocks conversion. There are third-party tools and Calibre plugins made to strip DRM and convert KFX, but that’s legally sensitive territory so I only use those with files I’ve bought and for personal use. If you want a simpler paid option, apps like Epubor can automate conversion, though I weigh the legal/ethical side before using them. If you’re uncomfortable, contact the retailer for an EPUB or use their reading apps instead.

Either way, I always keep originals and label converted files so I don’t lose track of what’s protected or not.