This app is handy and very easy to use optimizer, bulk resizer for image files. Your image files can be 10%-70% smaller. Supports PNG, GIF, Animation GIF, JPEG image files.

This app allows you to reduce the size of your image files without any noticeable quality loss. It works well in PNG format than GIF, JPEG format.
Supports GIF reducing the dimensions and reducing the colors.
Supports optimize with removing JPEG Meta EXIF information, Rotate, Flip, Grayscale.

You can select image files to convert from your local computer and from Google Drive directly. and Save the optimized files to Google Drive.

*Unlimited Bulk Image, Photo Resizer 
You can also resize PNG, JPEG images with special resizing algorithm in your browser.