How to read a .KFX file online
Three steps, a few seconds, no app.
Choose your .KFX file
Drag your .KFX file onto the box above, or click Choose file.
Supported
Your .KFX file is opened: its chapters, cover and table of contents are read, and scripts are dropped for safety.
Read your way
Turn pages with the arrow keys, change text size, switch to sepia or night mode, or scroll instead.
What is a .KFX file?
The open standard for reflowable e-books.
A KFX file is an Amazon Kindle Format 10 (KF10) e-book, introduced in 2015. Read it on a Kindle device (7th generation or newer) or in the free Kindle app on Windows, macOS, Android, or iOS. DRM-free KFX files can also be opened and converted in Calibre with the KFX Input plugin. Most KFX books bought from Amazon are DRM-encrypted and will only open in official Kindle apps.
Programs that open .KFX files
| Full name | Kindle Format 10 (KF10) e-book |
|---|---|
| Developer | Amazon.com, Inc. |
| First released | 2015 (Kindle Firmware 5.6.x, 7th-gen Kindle) |
| Category | Documents |
| MIME type | application/vnd.amazon.ebook |
Related viewers
Other free viewers for related formats.
Is my .KFX file uploaded anywhere?
No. Your .KFX file is unpacked and displayed for you. Your reading position is remembered for next time.
Can I read Kindle books bought from Amazon?
Only if they're DRM-free. Most purchased Kindle books are copy-protected, and we don't remove DRM. The reader tells you when a file is protected.
Why does my .KFX file look different from the publisher's layout?
For comfortable reading we apply our own typography and drop the file's scripts and most of its styling. Text, headings, images, tables and links are kept.
Can I read comics and manga?
Yes. CBZ and CBT open directly, CBR and CB7 through our archive engine. Switch between single and double pages, fit to width or height, and turn on right-to-left reading for manga.
What about PDF books?
Use our PDF Viewer. It has thumbnails, zoom and full-text search.
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