File Extension Library

.UNKNOWN File Extension

  • Category: Misc Files

What is an .UNKNOWN file?

.UNKNOWN file extension has been classified as Misc Files.

.UNKNOWN is Unknown File Type

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.

How to Open .UNKNOWN file on different platforms

Open .UNKNOWN File on Windows

  • Right-click a .UNKNOWN
  • Left-click "Open With" > "Choose another app"
  • Select the program that opens .UNKNOWN file and Select check box "Always use this app to open .UNKNOWN files" Press "Ok"

Open .UNKNOWN File on Mac

  • Right-click (or Ctrl + Left-click) the .UNKNOWN file
  • Click "Open With" > "Other.."
  • Then choose another program from the app list and press "Open"
  • Select check box "Turn on" for "Always open in app"

Open .UNKNOWN File on Linux

Right click on the .UNKNOWN file, choose "Open with" and select a program from the list above

Open .UNKNOWN File on iPhone

Select a file. If you don't see an application to open the .UNKNOWN file, tap "Share" and choose the right app.
Method 2
Save the file. Then open the app «Files». Touch and hold the file, then release your finger. You will see a black menu bar. After that tap "Share" and select an application.

Open .UNKNOWN File on Android

Tap the Settings icon on an Android smartphone, then select «Applications». Click the Settings icon in the upper right corner of the screen, to change the default apps.
If you want to open, edit, save or even convert .UNKNOWN files on Android, then your best bet is to download one of the dedicated apps available on Google Play.

How to fix problems with .UNKNOWN files

  1. You need to update the application that you normally use to open .UNKNOWN files. Only the latest version of the software supports the current .UNKNOWN file format
  2. You need to check the .UNKNOWN file for viruses. To do this, you need to scan it with a popular antivirus (Norton, Nod32, Kaspersky, Dr.Web, etc.)