Bulk Rename Files, Folders & Change Extensions in Windows

Categories Windows TutorialsTags , , 1 Comment

If you have just a few files in a folder, you can rename those files/extensions manually and easily. But if you want to rename tens of files/extensions or even 1000 files/extensions manually, it takes long time to rename. Again if files have no extensions and you want to set an extension for them all at once, so how to do that?

There are two ways to bulk/batch rename files, folders or extension in Windows operating system. You can bulk/batch rename by system command and other option is with external applications.

Bulk Rename by Command

1. Bulk rename multiple files/folders – To bulk rename multiple files/folders, open the folder and select files/folders you want to rename. Press Ctrl + A to select all.

Rename by context menu

Now Right-click on the first file/folder and then select “Rename” option (see in picture) and then enter your desired name. Having done this, press Enter or click anywhere inside the folder.

Bulk rename folders

Here I’ve renamed it to jump2. By this method, you can rename multiple files/folders, but remember that file extension can’t be renamed by this process!

2. Bulk change file extensions – Suppose, you have a folder that has different file formats or extensions like .png, .jpeg, .ico etc. and you want to change all these images to the .jpg file extension.

To achieve this, open the folder and press Alt + D in the folder. Then type cmd and hit Enter, a command window will open. Now type the following in it and hit Enter :

ren *.* *.jpg

Here all my file extensions changed png to jpg format and so easily.

Bulk rename command

3. Bulk add file extensions – Windows stores system images/audios without extensions, automatically updated lock-screen images stores in system directory without extensions. If you want to view/use the files for own purpose, you have to add extensions to the files. So how to bulk add file extension to these files?

To achieve this, open the folder and press Alt + D in the folder. Then type cmd and hit Enter, a command window will open. Now type the following in it and hit Enter :

ren * *.jpg

Work done! It will add .jpg extensions after the file names.

Batch Rename by Application

If you want to do it by an application, just install AdvancedRenamer application. After install, open the application and do the following change in the application (focus on red lines) –

AdvancedRenamer application

  1. Select Batch mode Rename and then click Add to add files/folders you want to rename.
  2. Check the New Name option and select dynamic Default Tags.
  3. And finally, select Name and extension from Apply to section.

Having done this, see rename preview in “New Filename” section. If you are happy with the preview showing then click on Start Batch on top, the files will be renamed. If not happy then change the “New Name” section.

You can now rename/change multiple files/folders/file-extensions and add file extensions in many ways. Please share your thoughts about the article and comment us describing your problems.

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