http://www.photosize.com/

A webpage offering free photo resizing. Very large photos distort the forums so a photo or image of approximately 1024 pixels or less wide is advisable.

NE recommends LANDSCAPE images be resized to no more than 1024 pixels in width.

PORTRAIT photos should have a width of less than 1024 as the height of the image will need a lot of scrolling depending on the resultant image height. NE recommends approximately 600 pixels for a PORTRAIT image. Depending on its height.

The webpage works by allowing you to select an oversize image, select its new width in pixels, and then the image to downloaded to your PC. You then need to upload the smaller image to a web image hosting site or other net account.