I have experience in photography, editing, and design and am therefore very familiar with image processing software. I can complete this task for you to a standard of excellence, and very quickly. I use Adobe photoshop to resize images with optimal quality. Can start immediately and handover files in Dropbox very easily - all it takes is sending you link to the folder of finished images, where you can download these or share them to others that need access to them. You don't even need a dropbox account to do this, follow the link upon their completion and instantly download.