(Note: This is a 32-bit program and so it is not compatible with MacOS Catalina and later.) Older Kindle for PC/Mac version 1.17 can sometimes be installed to work around this problem. Method 1 - Revert to an older version of Kindle for PC/Mac The following descriptions apply both to Kindle for PC and Kindle for Mac unless one is mentioned explicitly. There are several methods for either avoiding or handling KFX format. Unless additional steps are taken, these books will fail to convert in calibre with the error: "KFXError: This is an Amazon KFX book. Each book will appear in a separate subdirectory of the "My Kindle Content" folder with a file extension of ".azw". The Kindle for PC and Kindle for Mac programs use Amazon's KFX format for most books. There is also a new method (#6) using an old version of the Kindle for Android app described here. (Details in this thread.)This means that methods 1, 2, and 4 described below are no longer effective for those books. I still haven’t got KFX to work for me, but I don’t think I’ve actually broken anything this time.Important update: Amazon has made a change to their service so the books published since can no longer be downloaded using Kindle for PC or Mac versions prior to 1.39. I am very grateful to those dedicated developers who spend their free time reverse-engineering the DRM code. In which case, the existing work-arounds to get KF8 format should still work. It may be that Amazon will update Kindle for PC/Mac very quickly. How long this code will work is anyone’s guess. It also now includes code that should handle the latest KFX encryption used by the latest Kindle for PC and Kindle for Mac. This release incorporates numerous small bug fixes contributed through pull requests to the GitHub repository.
To leave a comment, see this post: DRM Removal Tools for eBooks.ĭeDRM_tools_7.2.1.zip can be downloaded from Please update to the latest version if you are having issues.
Version 7.2.1 of the tools is now available.
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