Files with mobi extension can be typically found as e-books saved in Mobipocket format, now mostly used by Amazon.

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Software that open mobi file

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MOBI file extension - Mobipocket eBook format

What is mobi file? How to open mobi files?

File type specification:

E-book file type icon E-book file type

File extension mobi is used for the Mobipocket books file format, a binary format for the distribution of eBooks. It is one implementation of the Open eBook Publication format with a number of proprietary extensions.

Mobipocket supports most features of standard HTML to format and layout text and images.

There is a reader for personal computers that works with either encrypted or unencrypted Mobipocket books.

A user can thus create documents in the Mobipocket-format (.mobi) and use personal comments, bookmarks and so on on all devices supporting those features.

Additionally, Amazon offers a free program called KindleGen which can convert or create documents in the Mobipocket format.

Updated: December 4, 2023

The default software associated to open mobi file:

Mobipocket Reader Desktop icon logoMobipocket Reader Desktop  Microsoft Windows software

Company or developer:

Mobipocket Reader Desktop allows users to read various books, dictionaries and other documents in electronic form on desktop PCs. Mobipocket Reader is also available for BlackBerry, Windows Mobile, Symbian, Palm etc.

Mobipocket was acquired by Amazon and integrated into its services.

Amazon Kindle for PC icon, Inc. logoAmazon Kindle for PC  Microsoft Windows software

Company or developer:, Inc.

Amazon Kindle for PC is software reader for Amazon e-books. Kindle is able to access your Kindle books, automatically synchronizes annotations between devices, creates highlights, notes, bookmarks etc.

Amazon Kindle for Mac icon, Inc. logoAmazon Kindle for Mac  Apple macOS / Mac OS X software

Company or developer:, Inc.

Amazon Kindle for Mac is e-book reader and Kindle e-book manager for Mac OS X. It is able to access into Kindle book store with more than 775,000 books.

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Help how to open:

Unencrypted Mobipocket books can be read on the Amazon Kindle e-Reader device natively as well as in Amazon Kindle apps on Mac OS X, the iPhone, Android devices, Windows, and Windows Phone devices.

By using third-party software programs such as Calibre, unencrypted Mobipocket books can also be read on Windows and Mac computers Linux computers..

How to convert:

You can convert MOBI e-books to another e-book format using specialized e-book converters.

Find conversions from mobi file:

mobi to cbr

mobi to doc

mobi to epub

mobi to mp3

mobi to mp4

mobi to pdf

mobi to text

Find converter to mobi file type:

acsm to mobi

azw3 to mobi

epub to mobi

fb2 to mobi

jpg to mobi

opf to mobi

vbk to mobi

File identification strings:

HEX code: 42 4F 4F 4B 4D 4F 42 49

List of software applications associated to the .mobi file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open mobi file, edit mobi file, convert mobi file, view mobi file, play mobi file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting mobi files.

mobi file viewer - programs that view mobi file - Mobipocket eBook format

Programs supporting the exension mobi on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for view mobi file action.

Microsoft Windows:

Main software associated with mobi file by default:
Mobipocket Reader Desktop small icon Mobipocket Reader Desktop
Amazon Kindle for PC small icon Amazon Kindle for PC
Other suggested software:
Calibre small icon Calibre

Apple macOS / Mac OS X:

Main software associated with mobi file by default:
Amazon Kindle for Mac small icon Amazon Kindle for Mac
Other suggested software:
Calibre for Mac small icon Calibre for Mac


Amazon Kindle:

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