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What is .cpt?

Name: Corel PhotoPaint 6.0
Extension: .cpt
Format: Binary
Category: Raster Image
Developer: Corel Corporation
Description: Corel PhotoPaint 6.0 CPT is a file type that is used to store graphics created in Corel PhotoPaint 6.0, a popular image editing software. It contains image data, such as layers, objects, effects, and other information related to the image.
MIME Type: image/x-corelphotopaint
Wikipedia: .cpt on Wikipedia