How to Show and Hide File Extensions in Windows?
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By default the file extensions (like .txt or .doc) are not shown in Windows. And its sometimes necessary to change the extension to change the file format. For example, in my previous post, “How to Lock and Hide Folders in Windows Without Additional Software?†I asked to copy the contents to Notepad (i.e. .txt) and change it to .bat format.
So, How to Show and Hide File Extensions in Windows?
If you are using Vista, Go to Control Panel -> Appearance and Personalization -> Click Folder Options.

If you are using Windows XP, Go to Control Panel and Under Classic View, Click Folder Options.
Click ‘View‘ tab, and Uncheck ‘Hide extensions of known file types‘.

Click ‘Apply‘ and ‘Ok‘
Another option to change file extensions when the extensions are hidden:
If you want to save a file in a format which is different from its current format, open the file in the editor and Click File -> Save As.
You will be given a pop-up box to enter the file name. Click the drop down in ‘Save as type‘ and select ‘All Files‘. Now enter the file name along with its new extension and save it.
















































[...] Update: If you are not sure how to change the file extension from .txt to .bat, check How to Change File Extension in Windows. [...]
[...] If you are here looking for how to view the extensions of files in windows, check ‘How to Show and Hide File Extensions in Windows?‘ [...]
hii,
how i can open tha .bat file eith using notpad password,
i can forget that password,so plese tell me how i can got that password or how i can opne that .bat file.pleas…
@anay, Just right click the file and click open with and choose any text editors to open .bat file
when i double click in bat file , it has not created any file (is it necessary to install ms-word(for doc file))
hi,
there is a file like this
adobe acrobat icon(or some other icon) file name
if i double clicked the file, it will open normally,
how can i make this icon to unknown means if i double clicked the file it should go to choose program mode.