Convert png to j2k Online: png2j2k
You can use Tom's Editor to easily convert images from
Portable Network Graphics .PNG to JPEG-2000 Code Stream Syntax .J2K.
Tom's Editor is a free, online image manipulation and converter program.
Go to Tom's Editor
Portable Network Graphics is an image format with extension PNG.
JPEG-2000 Code Stream Syntax is an image format with extension J2K.