Rename file extension with PowerShell

Last week I ended up finding that one of my directories of pictures lost their file extensions – so I thought I’d spin up PowerShell in Win8 and see if I could remember how to do.  

After a little trial and error I ended up with the following PowerShell Script – reminded me how powerful and easy PowerShell is for scripting all of Windows.

1. $proj_files = Get-ChildItem | Where-Object {$_.Extension -ne ".jpg"}
2. ForEach ($file in $proj_files) {
3. $filenew = $file.Name + ".jpg"
4. Rename-Item $file $filenew
5. }

Comments

• Anonymous
  September 17, 2012
  From cmd.exe, "ren *. *.jpg" will add .jpg to files that don't have an extension.  "ren * *.jpg" will replace existing extensions too.