This tutorial will go over how to Change format of multiple images at  once using Photoshop. This is also known as Bulk image format change in Photoshop(bridge).

If you want to convert image from one format to another, Photoshop and Photoshop Tools allow you to do this in just few minutes. For doing this process you requires Photoshop File Browser (or Adobe Bridge in CS3 or higher).

1) Open Photoshop.

2) click on "FILE" menu.

 3) Select "Browse in Bridge" option.
    A new window will open.
    In a "content" window select images you want to rename.

4) click on "Tool" Menu   

5) Hover "Photoshop" Menu.
    select "Image Processor" option.
    A new window will open
 

6) Select various options as per requirement like
    Destination folder,
    Image type,
    Copyright info 

7) Click on "Run" Button.
   
    Its done :)