I have a program on my computer to do this, but here's a good online site that I've used to quickly resize and image to upload.
It's really easy to do and no spam or anything!
Good luck!
KD
http://www.shrinkpictures.com/
There's also a great free site (
www.photobucket.com ) where you can store your pics and size them from there. What's great about this site it that they're protected out there on the web if something happens to puter, but you can resize and copy super easy codes to paste directly into post or use URL. It's great and I'd recommend it!