.J2C File Extension
File TypeJPEG 2000 Code Stream
What is a J2C file?
Bitmap image created using JPEG 2000 compression, which is similar to standard .JPG compression but uses a newer encoding standard that allows flexibility at the cost of computational complexity; can be viewed by most applications that support standard .JP2 files.
JPEG 2000 code stream files also use the .JPC file extension.