ResizR - Resize images online
Resizing images is a big task if you have not used Irfanview before. But now you don’t even need Irfanview. ResizR is web based tool that resizes images with no strain. Browse for the image in your desktop, set the new width and click the ResizR button. The height is automatically assigned depending on the width. The resized image can be saved for offline usage. Currently only jpg images are resized by ResizR.
To invoke the ResizR Firefox extension, right click any image on the web and select ResizR Image.