DOCX to AZW3 Converter

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

How to convert DOCX files to AZW3 online?

Step 1.

Upload DOCX-file

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

Convert DOCX 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 DOCX and AZW3 file formats

Name DOCX AZW3
Full name DOCX - Office Open XML Document Amazon KF8 eBook File
File extension .docx, .docm .azw3
MIME type application/vnd.-openxmlformats-officedocument.-wordprocessingml.-document application/octet-stream
Developed by Microsoft Amazon
Type of format Document file format
Description The Office Open XML file formats are a set of file formats that can be used to represent electronic office documents. There are formats for word processing documents, spreadsheets and presentations as well as specific formats for material such as mathematical formulae, graphics, bibliographies etc. 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 Office Open XML documents are stored in Open Packaging Convention (OPC) packages, which are ZIP files containing XML and other data files, along with a specification of the relationships between them. Depending on the type of the document, the packages have different internal directory structures and names. 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 DOCX conversion AZW3 conversion
Associated programs Microsoft Office, LibreOffice, Kingsoft Office, Google Docs. Kindle Fire, Kindle Reader, Kindle for Android, Kindle for iOS
Wiki https://en.wikipedia.org/wiki/Office_Open_XML_file_formats https://en.wikipedia.org/wiki/Kindle_File_Format