"Hi, how do I convert KFX books to MOBI format? I just purchased some books on Kindle Format 10 and would like to turn these books to MOBI books."

Many Kindle Format 10 owners may have the save questions as above one. They may want to convert KFX books to MOBI, ePub, TXT or PDF format for reading on other eReaders. This is not easy to complete, since most KFX files are DRM protected. You have to turn to DRM removal and eBook converter toolkit to do this. But luckily you come here. We would like to show you 2 effective ways to convert KFX to MOBI with 2 different KFX to MOBI converters.

Part 1: Brief Introduction to KFX

Firstly, let's take a brief look at KFX. What is KFX? What does KFX mean? A file with .kfx extension is an eBook created in the Kindle Format 10 (KF10), Amazon's successor to the .AZW3 (Kindle 8) format. It contains an Amazon eBook, which includes the text and metadata describing the book, such as the author, title, and number of pages. KFX files support enhanced typesetting capabilities that are not provided in previous formats, such as hyphenation, improved character placement and word spacing, and a more adaptable page layout and margins.

Brief Introduction to KFX

Since it's developed by Amazon, to open and view eBooks saved in the KFX format, Amazon provides a Kindle app for Windows, macOS, Android, and iOS.

Similar to its previous format developed by Amazon, KFX files are also DRM protected, which means the KFX files are protected from being further sharing or editing in other apps. You could only read these KFX files within Kindle Format 10. However, you could make use of DRM removal software tools to remove DRM protection from KFX files and then convert KFX files to other formats like MOBI or ePub for other uses. The below content would show you how to remove DRM protection upon KFX files and convert DRM protected KFX files to MOBI files.

Part 2: How to Convert KFX to Mobi with Leawo Prof. DRM

Leawo Prof. DRM is a professional DRM removal program that could remove DRM protection upon Amazon Kindle Format 10 eBooks and then convert KFX files to DRM-free ePub, PDF, Mobi, and other formats. You could easily convert KFX to MOBI with this DRM removal tool.

Download and install Leawo Prof. DRM. And then follow the below steps to learn how to convert KFX file to MOBI format.

Note: Beforehand, you need to make sure you have downloaded and installed Amazon Kindle software on your computer, and you have downloaded all KFX books within this Kindle software.

Step 1: Log in Kindle app on your computer

Launch Kindle software and then log in with the same Kindle account as that on your Kindle Format 10.

Log in your  Kindle desktop app

Step 2: Add eBooks from Kindle

Click the pencil icon in each loaded eBook title and then choose mobi as output format on the list. For time saving, check "Apply to all eBook files" option.

Choose  Kindle books to convert

Step 3: Set output directory

Click the pencil icon in each loaded eBook title and then choose mobi as output format on the list. For time saving, check "Apply to all eBook files" option.

Set output format

Step 4: Set output directory

Then, return to the main interface after setting MOBI as output format. At the bottom, set output directory in the "Output" box.

Choose  output directory

Step 5: Convert KFX to MOBI

Finally, click the bottom right "Convert" button to start converting KFX to MOBI. The DRM removal happens in the background.

Set output directory

After converting, you will get your KFX files in MOBI format. You could then freely read the converted KFX files on any MOBI compatible eReader devices.

Part 3: How to Convert KFX to Mobi with Calibre

Besides Leawo Prof. DRM, you could also make use of Calibre to convert KFX to MOBI format, a cross-platform open source eBook manager tool that enables you to read, edit, create, and convert eBooks. With DRM removal plugin, Calibre could even help you remove DRM upon KFX files and convert DRM KFX to MOBI format in DRM free.

Convert KFX to Mobi with Calibre

The below guide would show you how to convert KFX to MOBI with the help of Calibre.

1. Install Calibre software on your computer.

2. Download DeDRM plugin and KFX Conversion Input Plugin as well.

3. Load these 2 plugins into your Calibre through "Preferences > Plugin > Load plugin from file" option.

4. After loading plugins, click "Add File" button to browse and add KFX files into Calibre. To do this, you need to firstly download KFX files on your Kindle software, and then choose to add KFX files from "My Kindle Content" folder.

5. Click "Convert books" button in the tool bar, and then choose "MOBI" as output format in the "Output Format". Then click "OK" button to start converting.

The converting will carry out immediately. You only need to wait for a few minutes, depending on the size of source KFX files and computer performance.

The above 2 methods are both useful and practical for converting KFX to MOBI. But you could see clearly that Leawo Prof. DRM is much more convenient and simpler, while Calibre requires you to download extra plugins. Meanwhile, Leawo Prof. DRM could directly add KFX files from your Kindle software, while Calibre requires you to do extra work for adding source KFX files. Moreover, Leawo Prof. DRM actually helps you remove DRM protection upon more files, including iTunes videos, music and audiobooks, Audible audiobooks, eBooks from Kindle, Kobo and Abode Digital Editions, and Spotify music files. It's much better choice for you.