Change the Extentsion on Multiple Files
I was sent 40 attachments the other day. When I tried to open them I would get an error that said, “Adobe Reader could not open ‘filename.pdf’ because it is either not a supported file type or because the file has been damaged (for example, it was sent as an email attachment and wasn’t correctly decoded).”
Thinking maybe its not really a PDF I open the file in Notepad & see this:
JFIF…well that’s the JPEG File Interchange Format; i.e. it’s a JPEG not a PDF.
I change the extension from .pdf to .jpg & it opens right up. Of cource I’ve got 40 of these & really don’t feel like manually changing each one. So, to change the extension on multiple files, copy all of them to an empty folder (e.g. C:\Rename). Open a command prompt and browse to that folder. Type ren *.pdf *.jpg then press enter.
Now all the files will have the correct extension.