(Repost) Batch Change/Rename File Extensions In Windows

A good tips from http://www.addictivetips.com/windows-tips/batch-change-rename-file-extensions-in-windows/. Please refer to the original article.

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Batch Change/Rename File Extensions In Windows

Do you want to batch rename file extensions in one simple step? Changing each file extension separately can be a pain in some cases where you have to change extensions of more than 100 files.

One of method using command line. The method as follow:

  • Select the folder which has all the files who’s extension you would like to change. As an example I have made a folder named “test”, inside this folder I have placed four images in .jpg format. To change the extension of the files inside the folder, press Shift and right-click on the folder and select Open Command Window Here.

open command window

  • You will now see a Command Window with the current folderdirectory open. Now type the following command line,
ren *.(current extension name) *.(extension you want)
  • Since I want to change the extension from .jpg to .jpg, in my case the command line would be,
ren *.jpg *.jpg

change extension

  • Now all the files inside the folder will change to the extension you want. It’s that simple.

About zulkarnainh

I was born in Melaka (1987), holds the degree in B.Eng.(2010), M.Eng (2012) and Ph.D. (2016) in Civil Engineering at Universiti Teknologi Malaysia. I have been the UniMAP since 2016 and currently serving as Senior Lecturer. Feel free to contact me if you are interested to collaborate or pursuit a study (Master or Ph.D.) with me. Thank you!
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