What is the Difference Between MOBI and AZW3


Some of the Kindle eBooks are in the MOBI format, and some are AZW3 files. You may be confused about why Kindle eBooks are saved in different formats. What is the difference between those two eBook formats?

MOBI eBook format, developed by Mobipocket.com, is sold to Amazon in 2005. There are 2 MOBI formats used for eBooks – MOBI7 and MOBI8. MOBI7 (KF7) is the eBook format developed with basic HTML language. The eBooks saved as MOBI7 format do not support to change the font, text size, layout within Kindle e-readers. MOBI8 (KF8) is developed based on MOBI7 format with support HTML5 and CSS, which means it supports to display eBook with complicated layout and multi-media (except audios and videos).

In general, we could say that the MOBI8 format is the same as the AZW3 format. You may ask why? The reason is that the AZW3 eBook format is developed from MOBI8 format for publishing Kindle eBooks with DRM (Digital Rights Management) mechanism.

How to Convert PDF to MOBI

So in other words, the main difference between the MOBI and AZW3 formats is their support for complex layouts and multimedia. Because AZW3 eBooks support more styles, fonts, layouts and multimedia content (except audio and video) on Kindle devices, the reading experience of AZW3 (KF8) format e-books is better than that of MOBI (KF7) format eBooks.

As the proprietary formats of Amazon, it is obvious that you can't open books in these two formats on other apps or devices without associated with Kindle account. In which case, you are required to convert them to common formats for reading on more devices. Today, we would like to share an eBook converter, PDFMate eBook Converter Professional to help you convert Kindle books to common formats so that you can read them anywhere anytime.

eBook Converter Pro.

The most powerful eBook converting tool, specially designed for users to remove DRM from Kindle, Adobe, Kobo, Nook eBooks and convert them to various formats, including EPUB, MOBI, PDF, AZW3, TXT and KFX effortlessly.

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How to Remove DRM from Kindle Books

Convert eBooks with PDFMate eBook Converter Professional

Step 1: Launch PDFMate eBook Converter Professional

Please download and install PDFMate eBook Converter Professional on your computer. Then, launch the program to start eBook Conversion.

Step 2: Add eBooks

Please click 'Add file' button to add Kindle eBooks into the converter. You can add multiple eBooks at once.

Add eBooks

Step 3: Edit Metadata of the eBooks

After successfully importing the eBook files to the program, you can also click the 'Edit' button to edit all the important and useful meta information before conversion, including title, author, publishing date, publisher, etc.

Edit Metadata

Step 4: Choose Output Format and Adjust Settings

Click the 'Setting' button on the main interface, and then there will pop-up a window allowing you to change the output folder as required and set Source Location of your eBooks. Then, click the 'V' button next to the 'Convert' button and choose the PDF format.


Step 5: Conversion

When finish customization, click the 'Convert' button to start conversion. After the conversion is done, you can find the converted eBooks by clicking the 'history' button.


With PDFMate eBook Converter, you can convert Kindle eBooks to EPUB, MOBI, PDF, TXT, AZW3, and KFX formats easily. Now, you can read your Kindle eBooks on all your devices.

For more information about eBook Converter Professional, please visit http://www.pdfmate.com/ebook-converter-professional.html.

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