Resizr is a free online image editing site. I will allow you to use almost all the basic photo editing features. “RESIZR was conceived in July 2006 by Matt Miller, after trying to help a user upload an image to the Urban Pug Forums. After suggesting some tools, it became apparent that there might be a need for a brutally simple online image resizer.”
With Resizr you can Crop, Resize, Change filetype (GIF,PNG,JPG), sharpen, adjust levels, change the tone of the image (to B/W &&; sepia), adjust brightness and contrast and even control the quality of output file. Resizr is equivalent to a photo editing software. It is free and also saves your file for a specific amount of time before which you can download it.