What is a MOBI File?

How to Open, Edit, & Convert MOBI Files

MOBI Files
MOBI Files.

A file with the MOBI file extension is a Mobipocket eBook file. They're designed specifically for mobile devices with low bandwidth.

MOBI files support things like bookmarking, JavaScript, frames, and adding notes and corrections.

Note: MOBI eBook files have nothing to do with the top-level domain that's also .mobi.

How To Open a MOBI File

MOBI files can be read by Mobipocket Reader and created by Mobipocket Creator.

Both are free applications by Mobipocket.

Some other notable free programs that can open MOBI files are Calibre, Stanza Desktop, Sumatra PDF, Mobi File Reader, FBReader, and Okular.

MOBI files can also be read by popular eBook readers like the Amazon Kindle and many smartphones that support the format.

Additionally, many eBook readers, again, like the popular Kindle device, also have desktop software, mobile apps, and browser tools that allow the reading of MOBI files. The Amazon Kindle App is one example that supports Windows, Mac, and mobile devices.

Since opening eBook files like MOBI files is so popular on Kindle devices, I recommend reading Amazon's instructions on sending MOBI files to your Kindle if that's what you plan on doing with your MOBI file.

Tip: If you can't open your MOBI file with the suggestions from above, double-check that you are in fact working with a file that has the .MOBI extension.

I say this because some files look like MOBI files but really aren't related at all, and so they most likely can't be opened with the same software. MOB (MOBTV Video) files are one example.

How To Convert a MOBI File

The quickest way to convert a MOBI file is to use an online converter like DocsPal. You can upload the MOBI file to the website or enter the URL to an online MOBI file, and then choose one of many different file formats to convert it to.

EPUB, LIT, LRF, PDB, PDF, FB2, and several others are supported.

If you already have a program on your computer that opens MOBI files, you may be able to use it to save the MOBI file to one of a different format. Calibre, for example, can convert MOBI files to lots of different formats, and Mobi File Reader supports saving an open MOBI file to TXT or HTML.

MOBI files can be converted with other Free File Conversion Software Programs or Online Services too. An excellent example is Zamzar, an online file converter. It can convert MOBI files to PRC, OEB, AZW3, and many other popular file formats, and all you have to do is upload the MOBI file to the website and then download the converted file - nothing needs to be installed on your computer.

More Information on MOBI Files

Mobipocket has been owned by Amazon since 2005. Support for the MOBI format has been discontinued since 2011. Amazon's Kindle devices use the MOBI structure but the files have a different DRM scheme and use the AZW file extension.

Some Mobipocket eBook files have the .PRC file extension instead of .MOBI.

MobileRead Wiki has lots of information on MOBI files if you're interested in a deeper read.

More Help With MOBI Files

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more.

Let me know what kinds of problems you're having with opening or using the MOBI file and I'll see what I can do to help.

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