Batch rename files and file extensions in Windows 10

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If you have a bunch of files in a folder which you want to name sequentially and convert them to the same file type or format, how do you go about doing this? If it is just a few files, you can do it manually, but what if there are say 10-20 or even a 100 files? In this post, we will see how to batch rename files as well as change file extension for all files in a folder quickly & easily in Windows 10/8/7. This can be especially useful if you have multiple photographs or images of various names or file extensions, like .jpg, .png, etc and you would like to rename them to say India1.jpg, India2.jpg, etc for the sake of convenience,

Change file extension for all files in a folder

As an example we are assuming that you have several files in a folder of varying names and different file formats or extensions, and we want to change all these images to the JPG file extension. To begin the process, open the folder, press Shift and right-click in an empty spot inside the folder.

Batch rename files and file extensions
You will see a Open command prompt here context menu item. Click on it to open a command prompt window. Now type the following in it and hit Enter:

ren *.* *.jpg

Batch rename files and file extensions 2
Here we are using a wildcard as we want any file extension o be changed to.jpg extension. When you do this, you will see that all the files in the folder will get an extension of .jpg.

Batch rename files

Now the next thing you want to do is to rename the files sequentially. To do this, press Ctrl+A to select all the files in that folder.

Now rename the first file. Here I have renamed it to BatchRename. Having done this, press Enter or click anywhere inside the folder.
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You will see that all the files will be renamed in a numerical sequence as BatchRename1, BatchRename2, etc.
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So, by following this tutorial you will have batch renamed all the files sequentially numerically and also changed the file extension for all files in the folder quickly & easily.

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