http://webresizer.com/resizer/ is a great site which offer you to resize your image online and for free !!!!


* reduce image size
* crop photos
* sharpen
* resize - change width and height
* rotate
* adjust contrast, brightness, saturation
* convert photo to black and white
* add a border
* no registration required
* free


You can also try adionSoft Fast Image Resizer:
http://adionsoft.net/fastimageresize/


I use PhotoFilter for all my basic image editing works :)

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