.4KN File

File extension 4kn is related to some, most likely very old, uncommon or no longer used disk image file format, perhaps related to old floppy disks.

No specific information about this could be found, except that programs like ISOBuster can open it.

How to open:

You can import/open these .4kn files with IsoBuster.

How to convert:

Maybe can be converted to other similar disk image formats.