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Calibre
The desktop library for organizing, converting, and sending DRM-free ebooks. It is not a pirate tool.
People with a pile of legitimate EPUB/AZW3 files who want metadata, conversion, and send-to-device.
Calibre will not open store DRM. If the file is locked, use the official app.
| Formats | Reads and converts EPUB, AZW3, PDF, MOBI, CBZ, and many others — conversion quality varies |
|---|---|
| DRM / license | Calibre will not convert or open store DRM. EbookBook does not cover DRM removal. |
| How files get in | USB send-to-device, email, content server, or folder watching. |
| Store | Not a store. It catalogs files you already have the right to use. |
| Libraries | Calibre can store returned library files, but keeping a DRM loan after it expires is still a license issue. |
| Refunds | Not applicable. |
| Sync | Content server and Calibre Companion-style workflows. There is no official Amazon-class cloud account. |
| Sharing | A shared Calibre library on a home server is common. Keep purchased DRM books in their official apps. |
Start here
CalibreFormatsWhich file types open in CalibreDevicesSending and sideloading books onto CalibreLibrariesBorrowing library books with CalibreBuyingWhere to buy books that work in Calibre
Formats & Files
Which file types actually open, how conversion works, and where DRM changes the rules.
Which file types open in CalibreA practical list of formats Calibre will open, what gets converted on the way in, and what still fails.Converting books for Calibre without breaking layoutWhen conversion is necessary for Calibre, what survives, and which source formats you should leave alone.DRM and personal copies in CalibreThe difference between a store license and a file you own, written for people using Calibre.
Devices & Apps
Phones, tablets, e-ink readers, and the official apps — plus how to get a file onto them.
Sending and sideloading books onto CalibreThe reliable ways to get a file into Calibre without bouncing between three help articles.Using Calibre on phones, tablets, and e-inkWhat syncs, what looks different, and which device class is the right default for Calibre.Transfer mistakes to avoid with CalibreThe usual ways people lose a book, duplicate a library, or send the wrong format to Calibre.
Libraries & Lending
Public library apps, loan periods, holds, and what you can legally keep.
Borrowing library books with CalibreCards, apps, and how a library loan shows up in Calibre.Holds and loan periods for CalibreHow long you wait, how long you keep the title, and what Calibre does when the loan ends.What you cannot keep from library loans in CalibreLoans are licenses. Here is what expires, what you may export, and what Calibre will not let you archive.
Buying & Stores
Where to buy, regional locks, refunds, subscriptions, and family sharing.
Where to buy books that work in CalibreOfficial stores, DRM-free shops, and which purchases will never open in Calibre.Refunds and subscriptions in CalibreWhat a refund window looks like, and why Kindle Unlimited, Kobo Plus, or library-like subscriptions are not ownership.Region locks and sharing in CalibreWhy a storefront can refuse a sale, and who in a household can actually read the book in Calibre.
Reading Setup
Fonts, spacing, dark mode, highlights, and accessibility controls that make daily reading usable.
Fonts, spacing, and themes in CalibreA setup guide for Calibre so long sessions do not fight the default type.Highlights and notes in CalibreWhere Calibre stores annotations, what you can export, and what disappears if you leave the ecosystem.Accessibility controls in CalibreScreen readers, TTS, dyslexia-friendly fonts, and the limits of Calibre when the file itself is poorly tagged.