ePub and FB2, explained
What these e-book files actually contain, how to open them, and which readers support which format.
Convert FB2 to ePub
Drop an FB2 file in and download the same book as an ePub. It is
converted in your browser and never uploaded.
Open the ePub inspector
Drop a file in and see its version, metadata, contents and whether it
carries DRM. It is read in your browser and never uploaded.
What the formats are
- What Are CBZ and CBR Files?A CBZ or CBR file is a folder of page images packed into a ZIP or RAR archive. This covers how the two differ, which readers open them, and how to repack a CBR as a CBZ.
CBZCBR - What Is a DjVu File?DjVu is a format for scanned pages that keeps them much smaller than a PDF would. Here is how it does that, which readers open it, and how Calibre can convert one that has a text layer to PDF.
DjVuPDF - What Is an ACSM File?An ACSM file is not the e-book. It is a small file of download instructions that Adobe Digital Editions uses to fetch the protected ePub or PDF you bought or borrowed.
ACSMePubPDF - What is an FB2 file?FB2 is a Russian e-book format built on XML. What the files contain, which readers open them, and how FB2 differs from ePub.
FB2.fb2.zip - The technology of the ePub formatWhat is actually inside an ePub file: the XHTML documents, the packaging files and the container, and how the specification has changed since 2001.
ePub.opf.ncx - What is an ePub file?What an ePub file is, how to open one on a phone, computer or Kindle, and why it reflows to fit your screen instead of holding a fixed page.
ePub
Which one to choose
- ePub or PDF: which e-book format to choosePDF keeps the page, ePub keeps the reader comfortable. Which one to pick depends on whether the layout carries meaning, and on the screen you will read it on.
ePubPDF - Amazon's e-book formats: AZW3, KFX and MOBIKindle books come in Amazon's own formats rather than ePub. What AZW3, KFX and MOBI are, which is current, and why a MOBI file is now a dead end.
AZW3KFXMOBI
Getting a book onto a device
- How to Read a PDF on a KindleSend to Kindle accepts PDF files by web upload, app or email. The PDF usually keeps its fixed page, so small text stays small. The email approval step, the limits and the password rule.
PDF - How to read an ePub file on a KindleKindles do not open ePub files from the device, but Amazon converts one for you if you email it. The current route, and the old advice that no longer works.
ePubAZW3