Convert viff to psd Online: viff2psd
You can use Tom's Editor to easily convert images from
Khoros Visualization Image .VIFF to Adobe Photoshop
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Khoros Visualization Image is an image format with extension VIFF.
PSD is in internal image format of Adobe Photoshop. It can store all the features offered by Photoshop, like layers and paths. Images can be compressed or not.