Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Missing file extension

  1. Aug 11, 2006 #1
    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?
  2. jcsd
  3. Aug 11, 2006 #2


    User Avatar

    Staff: Mentor

    Where are you finding the file and what is the name?
  4. Aug 11, 2006 #3
    Right Click -> Properties

  5. Aug 11, 2006 #4


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Get an editor that can view any file in a hex/binary format.

    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.

    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.)
  6. Aug 11, 2006 #5
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Missing file extension
  1. File Extensions (Replies: 2)

  2. File extension dll (Replies: 4)

  3. .MSI file extension (Replies: 2)