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What is an EX_ File?


Question: What is an EX_ File?

Did you find an EX_ file on your computer and wonder what program should open it? Maybe someone emailed you an EX_ file but you're not sure how to use it. Perhaps you tried to open the EX_ file but Windows told you that it could not open it.

Before you can open an EX_ file (assuming it's even a file format that's intended to be viewed or edited), you'll need to determine what kind of file the .EX_ file extension refers to.

Answer: A file with the EX_ file extension is a Compressed EXE file.

Other types of files may also use the EX_ file extension. If you know of any additional file formats that use the .EX_ extension, please let me know so I can update this information.

How To Open an EX_ File:

The easiest way to open an EX_ file is to double-click on it and let your PC decide which default application should open the file. If no program opens the EX_ file then you probably don't have an application installed that can view and/or edit EX_ files.

Warning: Take great care when opening executable file formats received via email or downloaded from websites you're not familiar with. See my List of Executable File Extensions for a listing of file extensions to avoid and why.

An EX_ file isn't a useable file. You'll first need to convert the EX_ file to an EXE file so you can execute or use the file. You can do this using the expand command from the Command Prompt in Windows.

To do this, just execute the command as I do in this example:

expand filename.ex_ filename.exe

The new EXE file will be created and the original EX_ file will still exist.

If you know anything else about EX_ files, please let me know so I can update this page.

Tip: Use Notepad or another text editor to open the EX_ file. Many files are text-only files meaning no matter the file extension, a text editor may be able to properly display the file's contents. This isn't the case if your EX_ file is actually a compressed EXE file, but it's worth a try if you think it might be of a different format.

If you find that an application on your PC does try to open the EX_ file but it's the wrong application or if you would rather have another installed program open EX_ files, see my How To Change the Default Program for a Specific File Extension guide for making that change in Windows.

Important: You cannot usually change a file extension (like the EX_ file extension) to one that your computer recognizes and expect the newly renamed file to be usable. You'll need to convert the EX_ file to an EXE file as described above.

Still Having Problems Opening or Using an EX_ File?

See Get More Help for information about contacting me on social networks or via email, posting on tech support forums, and more. Let me know what kinds of problems you're having with opening or using the EX_ file and I'll see what I can do to help.

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