Convert pef to psd Online: pef2psd

You can use Tom's Editor to easily convert images from
Pentax Electronic File .PEF to Adobe Photoshop .PSD.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

PEF

Pentax Electronic File is an image format with extension PEF.

PSD

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.