Amazon Kindle has the most important eBook assortment on the earth, with essentially the most difficult eBook format mechanism. In most of different eBook shops, we normally get solely two codecs: EPUB and PDF. Whereas in Amazon Kindle, we are able to see KFX, KCR, AZW, AZW3, PRC, Mobi, Topaz, and extra…

Though a Kindle e book may be delivered as any of those codecs and so they virtually look the identical, there’s distinction amongst them. The distinction could also be slight, however we won’t ignore it.

Here’s a detailed introduction and explaination about these Kindle codecs.

If you’re within the book codecs past the Kindle books, simply learn eBook codecs clarify 2020.


KFX is the newest format of Amazon Kindle. To get this format of file you could have an E-Ink Kindle system, and the e book ought to have the “Enhanced Typesettings” property (yow will discover this property in Amazon product web page).

KFX is the successor of AZW6, it is even not an actual eBook file. You possibly can see it as a downloader. It downloads all of the stuff of a e book into your Kindle, no matter texts or photographs.

So there isn’t any change in any respect in the event you convert a KFX file to a different format or decrypt a KFX file.

Nevertheless, you will have various answer to convert KFX to EPUB/PDF/Mobi/AZW3.


If you happen to downloaded a Kindle e book through Kindle for Mac v 1.25.2 (and above), it is probably you’ll get a .kcr file. For now there is not a lot data about this eBooks format introduction.

Kindle .kcr is handled as the brand new Kindle KFX (new format, with new drm safety know-how). For more information, you possibly can learn this information Methods to Take away DRM from KCR and Convert KCR to PDF.

kindle kcr format


AZW is the most well-liked format for Amazon Kindle books. It’d stand for Amazon Phrase, however Amazon hasn’t formally confirmed that but.

If we sync the bought Kindle books to native pc through Kindle for PC/Mac, the synced books are normally saved in .azw format and guarded by Kindle DRM.

If an AZW file’s DRM safety is eradicated, it may be immediately transformed to EPUB/PDF whereas retaining the file full and skim by any book reader you will have.

To transform AZW to PDF/EPUB is fairly easy. Simply be certain that the information are downloaded through Kindle for PC/Mac, after which use AZW Converter to deal with them, no additional job is required.

Here’s a transient information: Greatest AZW Converter-Convert Kindle AZW to PDF/EPUB.

AZW3 (KF8)

AZW3 is a variation of AZW and also called KF8 (Kindle Format8). It was launched by Amazon in 2011 together with the discharge of Kindle Hearth. At starting it was solely supported by Kindle Hearth pill, however later expanded to Kindle 4th technology and Kindle for PC/Mac.

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In comparison with AZW or Mobi, it’s extra superior by supporting extra types, fonts and layouts. And it turns into a development that AZW3 is step by step changing Mobi.

These days Kindle books immediately downloaded to current generations E-Ink Kindle are normally saved as AZW3 format and guarded by DRM. And a few AZW information synced by Kindle for PC/Mac would additionally flip to AZW3 after the DRM safety is eliminated.

If you wish to strip the DRM from AZW3 information downloaded on E-Ink Kindle, please learn: Methods to Take away DRM From AZW3 eBook Recordsdata.

PRC and Mobi

When a PRC file and a Mobi file are DRM-free, they’re virtually the identical factor. However when they’re protected by DRM, they’re completely completely different.

If a bought Kindle e book is downloaded to Android system or synced by Kindle for Android app, the format can be PRC. Since Kindle Hearth tablets additionally belong to Android units, the books downloaded to Kindle Hearth tablets would even be saved as PRC format.

Mobi is definitely not an impartial format. It may be considered because the combination of prc and azw3. The book html content material is saved as 2 codecs in a mobi file after processed twice, one is in prc format and the opposite is in azw3 format. The file format is suitable within the early Kindle ereaders which may be rendered vastly on these units.

On this submit, you possibly can know easy methods to take away DRM from Kindle Android books: PRC DRM Removing for Kindle Android Books.

These days most Mobi books are DRM-free, however as soon as Amazon transforms them to AZW or AZW3, they’re protected by DRM.

Topaz (TPZ, or AZW1)

Usually talking, all of the codecs above are mainly generated upon Mobi and AZW, however the Topaz, or the variations TPZ and AZW1, are fairly completely different. And the distinction primarily lies within the file construction and database.

The Topaz information are all the time DRM-free. When they’re protected by Kindle DRM, they might change to TPZ or AZW1.

If a Topaz e book is synced through Kindle’s Whispersync, it turns into AZW1; whether it is immediately downloaded from web site, it turns into TPZ.

Take away DRM from TPZ/AZW1 books are the identical as from AZW, so you can even learn this information: Take away DRM from Amazon Kindle TPZ, AZW1, Topaz information.

What in regards to the HTMLZ? It’s only a zip archive of HTML information.


AZW6 information are very uncommon. They primarily seem in Japan Kindle retailer’s manga books.

An AZW6 file solely incorporates texts. All the photographs within the e book are saved within the associated folder. So in the event you convert an AZW6 e book to a different format, all the photographs might be misplaced, as they don’t seem to be contained within the e book file.

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Think about you purchase a Kindke AZW6 e book (you do not know its format earlier than shopping for) in a spot with poor WiFi community, then this e book will obtain low high quality photographs, you needn’t wait a very long time to start out studying the e book. Whenever you go to a spot with sturdy WiFi, Kindle will obtain prime quality photographs to interchange these low high quality photographs routinely.


All of the above digital book codecs are unique to Amazon Kindle eReaders, nevertheless, there’re codecs not supported by Kindle however are quite common and fashionable. Developed by Worldwide Digital Publishing Discussion board (IDPF), Epub is an open format based mostly on XML/XHTML.

As essentially the most commonly-used format, Epub is extensively utilized by a lot of retailers /units together with Kobo eReader, BlackBerry units, Apple’s iBooks app working on Macintosh computer systems and iOS units, Google Books app working on Android and iOS units, Barnes & Noble Nook, Amazon Kindle Hearth, Sony Reader, BeBook, Bookeen Cybook Gen3 , COOL-ER, Adobe Digital Editions, Lexcycle Stanza, BookGlutton, AZARDI, FBReader, PocketBook eReader, Aldiko, CoolReader, Mantano Reader, Moon+ Reader, the Mozilla Firefox add-on EPUBReader, Lucifox, Lucidor, Okular and different studying apps.

Incorporating HTML4 and CSS2 know-how, EPUB options every kind of formating, even video and audio may be embbeded into epub information. Adobe Digital Editions makes use of EPUB formatting and it adopts Adobe adept DRM mechanism.

To transform ebooks to EPUB or convert EPUB to different codecs, right here is the information: Greatest EPUB Converter Obtain for All eBook Codecs (With Steps).


Transportable Doc Format (PDF) is essentially the most extensively used file format which is created by Adobe. Besides Amazon Kindle, virtually all different retailers/units help PDF information. eBooks in PDF format are normally protected by Adobe adept DRM or the proprietary DRM adopted by the particular retailers.

There’re many privileges of PDF that different codecs cannot compete with. PDF information can protect and retain the unique formatting of file. The show impact preserves when studying a PDF on completely different units or platforms. PDF information are designed to ship content material swimsuit for A4 or letter scale. Content material in PDF just isn’t relowable, so there is perhaps problematic when studying PDF in a handheld system. It might probably present the perfect show impact when studying on computer systems, however it’s not a good suggestion to learn PDF information with small screens in most cellular eReaders.

If you happen to’ve bought some ebooks in PDF format and need to learn them on Kindle eReaders, cellphones or tables, you’d higher convert PDF to Mobi or Epub format.

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For prolonged studying, please seek advice from Greatest PDF to EPUB Converter–Convert PDF information to EPUB format, or Methods to Ship PDF to Kindle.

Studying Help Desk for Kindle Codecs

Kindle (firmware decrease than 5.8)
Kindle (firmware larger than 5.8)
Kindle for PC v1.21
Kindle for MAC v1.21.1
Kindle for iOS v6.03
Kindle for Android v7.2
Kindle Previewer v2.94



mobi (prc+azw3)


v: information on this format may be learn on the system or with the app

×: information on this format can’t be learn on the system or with the app

O: customers really learn the prc content material inside the mobi information

Kindle for iOS can solely learn information with extension of azw and mobi.

Kindle for Android can learn information with extension of prc, azw, azw3 and mobi. kfx information are additionally supported so long as the information are positioned in Kindle listing of Android File Supervisor.

Gadgets/apps that may learn kfx information:

1.Kindle eReaders with firmware upgraded to five.8,for instance Paperwhite2, Paperwhite3, Voyage, Oasis (the file extension have to be kfx)

2.Kindle for PC and Kindle for MAC, upgrading to the newest model is advisable

3.Kindle for Android, upgrading to the newest model is advisable (the file extension have to be kfx)

What’s the perfect eBook format for Kindle?

When requested about what’s the perfect eBook format for Kindle, normally I’ll say I do not know.

1. Kindle cannot learn ePub. However everyone knows that just about 3/4 eBook shops use EPUB resembling iBooks, Google.

2. Kindle helps PDF. However the truth is that the PDF studying on Kindle system is basically very, very poor.

3. Books we purchased from Amazon Kindle retailer are in KFX, Mobi or AZW (azw3) format.

We will not keep away from shopping for epub or pdf format eBooks, and we won’t (and in reality there isn’t any have to) purchase all these important fashionable studying units at hand. So speaking about which one is the perfect is meaningless. The right answer is to make use of Epubor Final, an eBook Converter software that can assist you convert eBooks codecs between Kindle Mobi and ePub, PDF with prime quality.

Obtain Epubor Final for Free

Suggestions: After all, you need to use Calibre because it’s actually a strong and free book administration software. Epubor Final is an efficient various to calibre as a result of it is simpler to make use of with a clear interface. And you may get buyer help everytime you meet issues.

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difference between kindle content infographic


joined Epubor since 2011, loves all the things about eBooks and eReaders. He seeks the strategies to learn eBooks extra freely and needs to share all he has bought with you.


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