How to distinguish/target extension-less files? (Command Batch, Windows 10)

If you only want to view or process files with an extension, use this syntax: dir /b /a-d [path] | findstr /m /l "." Only files containing a dot will be displayed. You can add this to the for statement to get the output to a processable variable. Of course, you must add an escape character before the pipe character in the for sentence. However, to perform the operation in the subdirectories as well, it is best to use the for sentence, as a dot may appear in the folder name. like this: for /f "tokens=*" %d in ('dir /s /b /ad') do @dir /b /a-d "%d" | findstr /m /l "." To do the opposite (showing only files without an extension) simply change the findstr /m parameter to findstr /v.