The JPEG 2000 is not a codec but a picture format. You can download a free Jpeg 2000 viewer below which the US Ge logical Service has recommended. The program called HiView Image Viewer was developed by the University of Arizona as comes in Windows and Linux options.
Jpeg 2000 Viewer Windows 7
The program can also view other formats and convert formats such as TIFF, JPEG, PNG file formats. Note the different version below. You have Windows, Linux as well as an Apple Macintosh OS X Jpeg 2000 version of the software which you will need to install on your computer. No mobile phone version as yet. Look for more information on their website.
Select your appropriate OS binary package: