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How to set the default program for opening files without an extension in Windows?

I am using http://www.pnotepad.org/ (i wouldnt mind switching to something else if it lightweight and has most/all features i like which i'll check on a app by app basis)

When i create a new tab/file and save it unless i write .txt i get a file with no extention. Which makes it hard to open since i cant double click it (i dont think i can tell win7 to set a default app for files with no extension)

How do i make pnotepad save with a .txt when non are specified?

  • 1
    Looks like you changed your question to something almsot completely different? I suggest you change it back...
    – SamB
    Jun 4 '10 at 19:45
  • I like the answer that shows how to make an association like described in your title. And the simple answer to the text of your question is to simply type .txt at the end of your filename. In the future, you should make an effort to have your title match the text of your question.
    – SDsolar
    Jan 2 '17 at 18:20

To create a default association for files with no extension, open Folder Options > File Types > New Type and apply the following settings:

Description of type: Text (you can type in any description)
Associated extension: . (just a period)
Actions: New
Action: Open
Application used to perform action: C:\Program Files\<pnotepad_folder>\pnotepad.exe

  • 4
    You cant do that in windows 7 but i decided to check out the registry and looked up the extension in root (i remember programming an app to add an extension). Then i looked at one of my default extensions which uses notepad and it only had a default value. I made a new key '.' as you suggested and set the same value. It worked.
    – user3109
    May 5 '10 at 10:31
  • 1
    Upvote. Excellent answer. I've sometimes wondered about that and now I will never forget it. Thanks.
    – SDsolar
    Jan 2 '17 at 18:21
  • Nice to help... Feb 1 '17 at 10:47

Wether or not a specific filetype is added if non is given is implemented by the program. This is not a default Windows setting.

Since I don't know what you are using it for I can't really recommend any editor, but I have been using notepad++ for years now and it has most, if not all, features you expect from a decent text-editor. See http://notepad-plus.sourceforge.net/ for the details.

  • 2
    +1 for notepad++. Until a recent update it also used to default to having no extension when saving new files. It now defaults to saving with a .txt extension
    – Shevek
    May 5 '10 at 9:14