How to Rename File Extensions

A lot of people here may ask how to rename a file extension in windows; well it’s very simple and takes little of your time. There are two ways to rename a file extension ‘without’ any program.

Number 1:- Folder Options:

Go into your Control Panel, in my case I use Windows Vista so I would press [Start then Control Panel].
In Control Panel open “Folder Options” and click the view tab and make sure ‘Hide file extensions for know files’ is not selected, then press Ok.

Now go into a folder and notice you can see your files extensions, rename them by presing F2 to whatever you'd like.



Number 2:-MS-DOS:

The difference between renaming files in DOS is that you can rename multiple files rather then one at a time, therefore making time gracious. Here I’ll provide you a few examples.

Go to your start menu and open run, then type “cmd”. Ok you’re in MS-DOS. Excellent… now find out which directory has your files and type:

Example

D:\media\wallpapers

In your case “D:\media\wallpapers” may not exist, so type in the directory that your have you files in. now in DOS change your directory like below...

C:\Documents and Settings\User>D:

D:\>cd media

D:\media>cd wallpapers

D:\media\wallpapers>ren *.jpg *.bmp

Ther you are done, just go & check in your directory is it changed or not?