Here is another excellent online graphic utility

http://www.xnview.com/en/index.html

At the base of the page, you will see a link to FixPicture, an online graphic utility.

The features:
- File size limit: 3072 KB (3 MEG)
- Resize
- Rotate
- Add the effect wanted
- Output in different file formats.

Once you uploaded the photo from your computer and selected fields you then copy back the converted image. It is only stored on their servers for 2 hours

I took as an example a photo of mine

Before



After


The only field I selected was to sharpen. I think for an online utility it has done an excellent job.
(and I used the HTML version)