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EPUB EPUB (eBook)

File extension .epub
Category eBook File
Description The ePUB file type is an open source format developed by the International Digital Publishing Forum (IDPF) . Based on XHTML, XML and CSS it works well with a number of software applications which has helped the popularity of the format grow. Despite this, there are a raft of rules that must be adhered to when creating an ePUB file which has attracted criticism of the format. The format allows DRM protection to be added to a file.
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Technical Details The ePUB format allows reflowable content. This means that the content fits the size and shape of the screen it is being displayed upon, in the same way that text on an HTML page changes depending on the size of the display. An ePUB file tends to consist of three elements: archive, metadata and content.
Associated programs
  • Adobe Digital Editions
  • Sony Reader
  • Apple iBooks
  • Mobipocket Reader Desktop
Developed by International Digital Publishing Forum (IDPF)
MIME type
  • application/epub+zip
Useful links

AZW3 AZW3 (eBook)

File extension .azw3
Category eBook File
Description AZW3 - Kindle Format 8 (KF8) is Amazon's newer version of AZW. It supports HTML5 and CSS3 which were not supported through the standard AZW format. It has a number of other formatting options and is used by Amazon for all new Amazon eBooks. It is supported by fourth-generation Kindle devices running firmware version 4.1.0 or later and the Kindle Fire device.
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Technical Details KF8 (also called AZW3) is essentially a compiled ePub that has utlises a Palm database and Amazon's DRM scheme. It targets ePub 3 version support but existing ePub can also be used. The internal format has been decoded using mobi_unpack. The basic format remains as a PDB file similar in structure to a MOBI. More oftent than not a KF8 file will contain both a MOBI file at the beginning and the newer KF8 version of ePub later.
Associated programs
  • Kindle Reader
  • Kindle for iOS
  • Kindle for Android
  • Kindle Fire
Developed by Amazon
MIME type
  • application/octet-stream
Useful links

EPUB Convert EPUB file

Using Zamzar, it is possible to convert EPUB files to a variety of other formats

  • epub to azw3 (Amazon KF8 eBook File)
  • epub to fb2 (FictionBook 2.0 File)
  • epub to oeb (Open eBook File)
  • epub to lit (Microsoft eBook File)
  • epub to lrf (Sony Portable Reader File)
  • epub to mobi (Mobipocket eBook)
  • epub to pdf (Portable Document Format)
  • epub to mp3 (Compressed audio file)
  • epub to pdb (Palm Media eBook File)
  • epub to pml (eBook File)
  • epub to prc (Mobipocket eBook File)
  • epub to rb (RocketEdition eBook File)
  • epub to tcr (Psion eBook File)
  • epub to txt (Text Document)

EPUB to AZW3 - Convert file now

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