Identify File Type Without Extension

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Discussion Overview

The discussion revolves around identifying a file type when the file lacks an extension. Participants explore various methods and tools that could assist in determining the file's format, focusing on practical approaches rather than theoretical explanations.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests checking the file's properties to gather information about it.
  • Another recommends using a hex or binary editor to examine the file's contents, indicating that the beginning of the file may provide clues about its format.
  • There is a proposal to try changing the file extension on a copy of the file to see if it opens with a default application, while cautioning about potential risks if the file is infected.
  • A link to a tool for identifying file types is shared, which may help in the identification process.

Areas of Agreement / Disagreement

Participants present multiple methods for identifying the file type, but there is no consensus on a single best approach, and the discussion remains open-ended with various suggestions offered.

Contextual Notes

Some methods depend on the user's ability to interpret hex/binary data, and the effectiveness of trial-and-error approaches may vary based on the user's experience and the nature of the file.

SN1987a
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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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Where are you finding the file and what is the name?
 
Right Click -> Properties

:)
 
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.)
 

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