What is an AZW File?
An AZW file is a Kindle eBook Format file, rooted in the Mobipocket (MOBI) format. Typically DRM protected, it's used for Amazon's Kindle eBook reader devices. When downloading eBooks online or transferring Kindle books, you will likely encounter AZW files. These files store bookmarks, annotations, read position, page numbers, and more.
Newer Kindle devices employ KFX (KF10) or AZW3 (KF8) formats for eBooks.
How to Open an AZW File?
For Windows, Mac, Android, or iOS, use Amazon's free Kindle app or Kindle Previewer. Calibre or Sumatra PDF work for desktop users if the book is DRM-free.