Convert jp2 to flif Online: jp22flif

You can use Tom's Editor to easily convert images from
JPEG-2000 JP2 File Format Syntax .JP2 to Free Lossless Image Format .FLIF.
Tom's Editor is a free, online image manipulation and converter program.

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JP2

JPEG-2000 JP2 File Format Syntax is an image format with extension JP2.

FLIF

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