What is .UNKNOWN file extension?
.UNKNOWN file extension is a known file type. This section of easyfileopener.com tells you everything you need to know about this extension.
Unknown Windows file that does not have a file association; may have an ".unknown" extension to serve as a placeholder for the file's correct extension.
If you have a file with either no extension or an ".unknown" extension, you can try to view the contents of the file by opening the file with a text editor. However, if the file is saved in a binary format, a text editor will not display the file's contents correctly. If you believe you know what the file type is, you may try changing the extension to the appropriate suffix and then attempt to open the file.
You can see a list of software programs here on easyfileopener.com that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.