Convert ebook files online

Conversion Results:
# Output File Source File Action


1. Click "Choose File" button to select a file on your computer. You can also click the dropdown button to choose online file from URL, Google Drive or Dropbox.

2. Choose a target ebook format. The target ebook format can be AZW3, EPUB, DOCX, FB2, HTML, HTMLZ, OEB, LIT, LRF, MOBI, PDB, PMLZ, RB, PDF, RTF, SNB, TCR, TXT or TXTZ.

3. Click "Convert Now!" button to start conversion. The output files will be listed in the "Conversion Results" section. Click icon to show file QR code or save file to online storage services such as Google Drive or Dropbox.

Compare AZW with DOCX:
Full name Kindle Format 8 Office Open XML Document
File extension .azw,.azw3,.azw4 .docx, .docm
MIME application/vnd.-amazon.-mobi8-ebook application/vnd.-openxmlformats-officedocument.-wordprocessingml.-document
Developed by Microsoft
Type of format Ebook file format Document file format
Introduction Kindle devices are designed to use Amazon's own e-book formats: AZW. In late 2011, the Kindle Fire introduced "Kindle Format 8" (KF8), also known as AZW3 file format. AZW3 supports a subset of HTML5 and CSS3 features, while acting as a container for a backwards-compatible MOBI content document. 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.
Technical details Kindles do not support the EPUB file format used by many other e-book readers. Similarly to EPUB, Amazon's file formats are intended for reflowable, richly formatted e-book content and support DRM restrictions, but unlike EPUB, they are proprietary formats. 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.
Associated programs Calibre, KindleGen Microsoft Office, LibreOffice, Kingsoft Office, Google Docs.
Sample file sample.azw sample.docx
Wiki AZW on Wikipedia DOCX on Wikipedia