Convert jp2k to jpg Online: jp2k2jpg

You can use Tom's Editor to easily convert images from
JPEG 2000 .JP2K to Joint Photographic Experts Group JFIF .JPG.
Tom's Editor is a free, online image manipulation and converter program.

Go to Tom's Editor

JP2K

JPEG 2000 is an image format with extension JP2K.

JPG

Joint Photographic Experts Group JFIF is an image format with extension JPG.