A free app for Android, by Code Creatives Apps.
Photo Resizer: Image Size Editor & Compressor is a free photo editing application that allows you to resize your photos in a quick and easy way. It is designed to be used on your Android phone or tablet, and it is compatible with almost all image files (.png,.bmp,.gif,.tiff,.ppt,.wmv, and.xbm). You can choose between two different sizes (the smaller one is for the best quality, and the larger one is for the speed). It is designed to be used in an easy and quick way, and it has a user-friendly interface that is very easy to use.