Convert jpt to psd Online: jpt2psd

You can use Tom's Editor to easily convert images from
JPEG-2000 Code Stream Syntax .JPT to Adobe Photoshop .PSD.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

JPT

JPEG-2000 Code Stream Syntax is an image format with extension JPT.

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.