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If you wish to change the extension on multiple files you simply change directory to the folder in question and simply use ren. But what if the file has no extension, i.e. someone deleted it.

Example:

If I wanted to change a folder full of .txt files to .xml I'd use

ren *.txt *.xml

But what if the .txt files did not have the .txt extension, so that letter.txt was simply letter?

Any help would be appreciated!

user2963668
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2 Answers2

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Use the following command for renaming all files (including for those who do not have an extension)

ren *.* *.xml
parag
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For files with out "." as window delete it if no extension is named do 

ren * *.<extension>
Ricardo Mojica
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