The File Extensions Database

.KFX File Extension

  • Developer by: Amazon
  • Category: eBook Files
  • Format: Binary

What is an .KFX file?

.KFX is Amazon KF10 eBook File

A KFX file is an eBook created in the Kindle Format 10 (KF10), Amazon's successor to the .AZW3 (Kindle 8) format. It contains an Amazon eBook, which includes the text and metadata describing the book, such as the author, title, and number of pages. KFX files support enhanced typesetting capabilities that are not provided in previous formats, such as hyphenation, improved character placement and word spacing, and a more adaptable page layout and margins.

KFX file open in Kindle for Mac 1.2

eBooks may be saved in one of several formats. The format of an eBook downloaded from the Amazon store depends on the device being used to download and read the eBook. It may be saved in the KFX format or in the .MOBI, .AZW, or .AZW3 formats.

To open and view eBooks saved in the KFX format, Amazon provides a Kindle app for Windows, macOS, Android, and iOS. You can also use Calibre, a popular program for managing and opening various eBook formats.

Programs that open Amazon KF10 eBook File
Amazon Kindle for PC
Amazon Kindle for Mac
Amazon Kindle
Amazon Kindle
File Type 2 Kofax Image File
Developer by: Kofax Category: Raster Image Files Format: Binary

Raster image created by Kofax scanning and imaging software products; contains a graphic formatted as a Kofax Group 4 image; contains a 128 byte header, which includes information about the image size, date created, date modified, bit depth, and resolution; also contains a description text field.

Programs that open Kofax Image File
Corel PaintShop Pro 2019

How to solve problems with KFX files

  • Associate the KFX file extension with the correct application. On :
    Windows: Right click on any KFX file and then click "Open with" > "Choose another app". Now select another program and check the box "Always use this app to open *.KFX files". Mac: Right click (or Ctrl-click) the KFX file, then click "Open with" > "Other...". Then choose another program and check the "Always Open With" box. Linux: Right click on the file, and select "Open with" and choose another program. iPhone: Tap the file. If you do not see an app to open the file, then tap Share "Share" and choose an app. Alternatively, save the file. Then open the Files app Files app. There long-press on the file, then release your finger. You will see a black menu bar. Then tap "Share" and select an app. Android: Tap the Settings icon on your smartphone, then tap on the Apps section. There tap the Options icon in the top right-hand corner of the screen to change the default apps.
  • Update your software that should actually open .KFX is Amazon KF10 eBook File. Because only the current version supports the latest KFX file format. Search, therefore, e.g. on the Amazon manufacturer website after an available .KFX is Amazon KF10 eBook File update.
  • To make sure that your KFX file is not corrupted or virus-infected, get the file again and scan it with antivirus software.