Convert jp2k to flif Online: jp2k2flif

You can use Tom's Editor to easily convert images from
JPEG 2000 .JP2K to Free Lossless Image Format .FLIF.
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.

FLIF

Free Lossless Image Format is an image format with extension FLIF.