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EPUB
The open reflowable ebook format used by almost every store except Amazon's purchased Kindle files.
Anyone who wants one file that can move between Kobo, Apple Books, Play Books, and Calibre.
A store EPUB can still carry Adobe DRM or LCP. The extension is not a promise of freedom.
| Formats | EPUB 2, EPUB 3, fixed-layout EPUB, KEPUB as a Kobo flavor |
|---|---|
| DRM / license | EPUB itself has no DRM. Stores may wrap EPUB in Adobe DRM, LCP, or vendor DRM. |
| How files get in | Any app that opens EPUB: Apple Books, Kobo, Google Play uploads, Calibre, Thorium, and many others. |
| Store | Most non-Amazon stores deliver EPUB |
| Libraries | Library EPUBs are usually Adobe DRM or LCP, not a naked .epub you keep forever. |
| Refunds | Refunds follow the store, not the file extension. |
| Sync | Naked EPUB files do not sync unless you put them in a cloud folder or an app with its own account. |
| Sharing | A DRM-free EPUB is just a file. Sharing store-DRM'd EPUBs usually violates the store terms. |
Start here
EPUBFormatsWhich file types open in EPUBDevicesSending and sideloading books onto EPUBLibrariesBorrowing library books with EPUBBuyingWhere to buy books that work in EPUB
Formats & Files
Which file types actually open, how conversion works, and where DRM changes the rules.
Which file types open in EPUBA practical list of formats EPUB will open, what gets converted on the way in, and what still fails.Converting books for EPUB without breaking layoutWhen conversion is necessary for EPUB, what survives, and which source formats you should leave alone.DRM and personal copies in EPUBThe difference between a store license and a file you own, written for people using EPUB.
Devices & Apps
Phones, tablets, e-ink readers, and the official apps — plus how to get a file onto them.
Sending and sideloading books onto EPUBThe reliable ways to get a file into EPUB without bouncing between three help articles.Using EPUB on phones, tablets, and e-inkWhat syncs, what looks different, and which device class is the right default for EPUB.Transfer mistakes to avoid with EPUBThe usual ways people lose a book, duplicate a library, or send the wrong format to EPUB.
Libraries & Lending
Public library apps, loan periods, holds, and what you can legally keep.
Borrowing library books with EPUBCards, apps, and how a library loan shows up in EPUB.Holds and loan periods for EPUBHow long you wait, how long you keep the title, and what EPUB does when the loan ends.What you cannot keep from library loans in EPUBLoans are licenses. Here is what expires, what you may export, and what EPUB will not let you archive.
Buying & Stores
Where to buy, regional locks, refunds, subscriptions, and family sharing.
Where to buy books that work in EPUBOfficial stores, DRM-free shops, and which purchases will never open in EPUB.Refunds and subscriptions in EPUBWhat a refund window looks like, and why Kindle Unlimited, Kobo Plus, or library-like subscriptions are not ownership.Region locks and sharing in EPUBWhy a storefront can refuse a sale, and who in a household can actually read the book in EPUB.
Reading Setup
Fonts, spacing, dark mode, highlights, and accessibility controls that make daily reading usable.
Fonts, spacing, and themes in EPUBA setup guide for EPUB so long sessions do not fight the default type.Highlights and notes in EPUBWhere EPUB stores annotations, what you can export, and what disappears if you leave the ecosystem.Accessibility controls in EPUBScreen readers, TTS, dyslexia-friendly fonts, and the limits of EPUB when the file itself is poorly tagged.