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Kindle is an e-book reader designed and developed by Amazon.com. Many e-books you see on the Internet store their files in the EPUB file format. Kindle devices store their e-books in a MOBI file format. Unfortunately, Kindle cannot read files in the EPUB file format.

If you have an e-book in the EPUB file format, you must convert it to a MOBI file format before the Kindle can read it. There are many different ways to do this. There are many tools out there to help you convert an EPUB to MOBI file format.

What is an EPUB file?

A file with an .epub file extension is a popular file format for storing ebooks and other content. EPUB is the technical standard of the International Digital Publishing Forum (IDPF) in September 2007. EPUB files can store words, images, stylesheets, fonts, metadata details, and tables of content.

How do I view an EPUB file?

There are many EPUB viewers available. If you have a Mac, you can double-click on the .epub file and the Books application will automatically open it up. You can also open it with Calibre.

What is a MOBI file?

A file with a .mobi file extension is a Mobipocket e-book format based on the Open eBook standard using XHTML and can include JavaScript and frames.

How do I view a MOBI file?

Amazon Kindle devices support the MOBI file and can open it up. You can also open it with Calibre.

Online

This site converts an EPUB to Kindle format. It works if you are running Windows, Mac or Linux. There is no software to be installed. Just go to the website and upload your file. Within a few minutes, your converted file is ready to be downloaded.

You can convert other file formats too. It is not limited to EPUB file format. You can convert file formats such as DOC, PPT, ODS, and PDF.

This site also converts an EPUB to MOBI format. Similar to the previous site, it supports conversion to other formats too.

Linux

Install the program called Calibre to convert e-books from one format to another. If you use Debian Linux, install Calibre by running

sudo apt-get install calibre

Once the package is installed, you can run the command line command such as the following to convert mybook.epub to mybook.mobi.

ebook-convert mybook.epub mybook.mobi

It will take a few minutes to convert the EPUB file format to MOBI file format.

If you have a lot of e-books in EPUB file format that you want to convert to MOBI file format, you can do so by running the following:

for file in *.epub; do ebook-convert "${file}" "${file%.epub}.mobi"; done

This will batch the files and convert them one by one to a Kindle e-book. Come back and drink some tea. It may take some time if you have a lot of files you want to convert.

Python EPUB to MOBI Format

Python doesn’t have any built-in module to convert EPUB to MOBI format. However, it can call out to a process to perform the conversion. If you have program Calibre installed on your Linux machine, you can call this program to do the conversion.

In GitHub, there is an example program called epub2mobi.py that will convert a file from EPUB to MOBI format. As seen in the program, this is done by importing “os” and calling the “system” method to do the conversion. It looks at all the files in a directory and converts any files with .EPUB extension to .MOBI extension. If you do this routinely, the program saves a lot of time because you don’t have to specify the file one by one.

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