Optimize your images online

If you have no imaging software install on your desktop then no problem
you can also Optimize your images online too
Smush IT is the Best service for this purpose

http://smushit.com/
They also have the Firefox Extension to optimize the images

The Have 3 Ways to Convert Images Online

• You can upload a bunch of pictures in your browser
• You can provide us with a list of image urls or
• You can get a Firefox Extension to optimize the images found on any web page