Convert psd to psid Online: psd2psid

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

Go to Tom's Editor

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.

PSID

PostScript image is an image format with extension PSID.