MOBI to AZW3 Converter

Select files for conversion or just drag and drop them to the upload area

How to convert MOBI files to AZW3 online?

Step 1.

Upload MOBI-file

Click "Choose File" button to select a mobi file on your computer. MOBI file size can be up to 50 Mb.
Step 2.

Convert MOBI to AZW3

Click "Convert" button to start conversion.
Step 3.

Download your AZW3

When the conversion process is complete, you can download the AZW3 file.

Information about MOBI and AZW3 file formats

Name MOBI AZW3
Full name MOBI - Mobipocket Amazon KF8 eBook File
File extension .mobi, .prc .azw3
MIME type application/x-mobipocket-ebook application/octet-stream
Developed by Mobipocket SA Amazon
Type of format Ebook file format
Description Mobipocket SA is a French company incorporated in March 2000 that created the .mobi e-book file format and produces the Mobipocket Reader software for mobile phones, personal digital assistants (PDA) and desktop operating systems. AZW3 - Kindle Format 8 (KF8) is Amazon's newer version of AZW. It supports HTML5 and CSS3 which were not supported through the standard AZW format. It has a number of other formatting options and is used by Amazon for all new Amazon eBooks. It is supported by fourth-generation Kindle devices running firmware version 4.1.0 or later and the Kindle Fire device.
Technical details The Mobipocket e-book format is based on the Open eBook standard using XHTML and can include JavaScript and frames. It also supports native SQL queries to be used with embedded databases. The Amazon Kindle's AZW format is basically just the Mobipocket format with a slightly different serial number scheme, and .prc publications can be read directly on the Kindle. The Kindle AZW format also lacks some Mobipocket features such as JavaScript. KF8 (also called AZW3) is essentially a compiled ePub that has utlises a Palm database and Amazon's DRM scheme. It targets ePub 3 version support but existing ePub can also be used. The internal format has been decoded using mobi_unpack. The basic format remains as a PDB file similar in structure to a MOBI. More oftent than not a KF8 file will contain both a MOBI file at the beginning and the newer KF8 version of ePub later.
File conversion MOBI conversion AZW3 conversion
Associated programs Mobipocket Reader Kindle Fire, Kindle Reader, Kindle for Android, Kindle for iOS
Wiki https://en.wikipedia.org/wiki/Mobipocket https://en.wikipedia.org/wiki/Kindle_File_Format