An unknown file extension can sometimes be used as temporary file extensions.

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UNKNOWN file - Unknown file extension

What is unknown file? How to open unknown files?

File type specification:

Various data file type icon Various data file type

The unknown file extension can sometimes be used as temporary file extensions for files that are currently worked on, or are somehow corrupted.

Updated: August 14, 2018

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .unknown file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

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