Identify File Type Without Extension

In summary, the conversation discusses different methods for determining the type of file without an extension. These methods include using a hex/binary editor, searching for the file format, and trial-and-error with changing the file extension. It is important to be cautious when using trial-and-error, as the file could potentially be infected with a virus. Another tip is to look for similarities in the file's basename or date to make an educated guess about the file type. Additionally, the conversation suggests using the GNU file utility for determining file types.
  • #1
SN1987a
35
0
I have this file that has no extension (not just bcs it's hidden), so I don't know what to use to open it. Do you guys have any ideas on how to figure out what the file is?
 
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  • #2
Where are you finding the file and what is the name?
 
  • #3
Right Click -> Properties

:)
 
  • #4
Get an editor that can view any file in a hex/binary format.
http://www.google.com/search?q=hex+editor

You might get a clue from looking at the start of the file.
If it's not obvious at a glance, you might have to google to learn about the various file formats.
http://www.google.com/search?q=file+format

You could also try trial-and-error... make a copy and change the extension of the copy, then try to have the default application open it. Of course, there is some danger here if your file is infected with a virus or something.

(If you have files that are somehow similar in basename or date, you may be able to guess what it is.)
 

1. What is a file extension?

A file extension is a set of characters at the end of a file name, preceded by a period, which indicates the type of file. It is typically used to identify the software program associated with the file and how it should be opened.

2. Why is it important to identify a file type without an extension?

There are several reasons why it may be necessary to identify a file type without an extension. Some common reasons include when the file has been corrupted and the extension has been removed, or when the file has been downloaded from the internet and the extension has been changed or removed.

3. How can a file type be identified without an extension?

There are a few ways to identify a file type without an extension. One method is to use a file identification tool or software. Another method is to open the file in a text editor and look for clues in the file's content, such as file headers or metadata. Additionally, some operating systems have built-in tools that can identify file types based on their content.

4. What are some common file types that do not have extensions?

Some common file types that do not have extensions include system files, executable files, and configuration files. These file types often do not have extensions because they are not meant to be opened or edited directly by the user.

5. Can a file type without an extension still be opened and used?

Yes, a file type without an extension can still be opened and used. However, it may be more difficult to open and use these files without the proper extension or knowledge of the file type. It is important to properly identify the file type in order to open and use it correctly.

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