Change Multiple File Extensions In Windows

Imagine you a get a set of image files which are in .bmp format and you want to change them in .png format. What will you do then? Are you going to save them as .png one by one? It will take a lot of time time if you change their file extension individually. So what is the remedy? We faced the problem and to solve that we found few methods by which you can change multiple file extensions in Windows.

Let’s implement these ideas. There are two methods by which you can change multiple file extensions. We will discuss both.

By Using File Extension Changer

There is a simple utility named File Extension Changer which can change multiple File Extensions at a time. There are many features of this program, out of which few are listed here:


  • You can use it through right click as it can be easily integrated in file’s context menu.
  • If you integrate it in folder’s context menu then you would be change extensions of multiple files.
  • You can use drag & drop method to add files and folders.

  • In its advanced mode you can go for conditional extension changing.
  • You can also provide a new path where all your new files with changed extensions will be saved in a new folder.

You can add or remove context menu entries at the time of installation (refer the above image).File Extensions Changer is a Softpedia certified software.

Without Using Any Software

You can also change extensions without using any software like File Extension Changer. This you can do by a simple method. Steps are mentioned below.

  • Select the folder having files whose extensions you want to change.
  • Create a new .txt document.
  • Open the text document and type (say I am going to change .bmp to .png)

REN *.bmp *.png

Note: Here the first file extensions is the one which you have and the second extensions is the one in which you want to change. Like here I want to change file extension .bmp to .png. File extensions are case sensitive so make sure that you write extensions in their original cases. You can write another same command for different file extension (if you have more than one type of file). Give space after every word.

  • Once you are done, save the document.
  • Now first make the file extensions visible. To do this, go to “Tools” in Menu bar and click on “Folder Options”.

  • A new window will appear for folder options. Click on “View” tab to get more options.
  • Uncheck the option for “Hide extensions for known file types”.

  • Click “Apply” to save your settings. As soon as you do this, you will see the file extensions visible.
  • Now edit the file extension of that text document which you just created. Replace .txt to .cmd.

  • Hit enter when you are done with changing extension of that text file. You will find the extensions of all other files changed.

These are two methods by which you change extensions of any file or multiple files. You can apply same method in any version of Windows i.e. Windows XP, Windows Vista & Windows 7.

About the author

Rockin Satyesh is founder and editor-in-chief of iTechMag. He prides himself in testing web & mobile apps. Satyesh is into web research and strategy development from past 5 years. He can be found on Facebook, Google and microblogs on Twitter as @rockinfuture


how to change multiple file extensions at once,change multiple file extensions at once,change multiple file extensions,how to change multiple file extensions,change extension of multiple files windows 7,changing multiple file extensions at once,change multiple file extensions windows 7,change extension multiple files,change extension of multiple files,how to change many file extensions at once,

{ 5 comments… read them below or add one }

Leave a Comment

Previous post:

Next post: