Photoshop offers free online image editing at http://www.photoshop.com/

  • Click on Online Tools > Photoshop Express Editor > Upload Photo
  • Click on the Crop & Rotate tool if needed > Mover corner handles as necessary.
  • Click on Resize.
  • Click on Auto Correct > Select best image.
  • Click on Sharpen.

Click on Done in the lower right-hand corner.