Format JPEG 2000 was introduced in 2000 and since then we can see discussions about its suitability for long term preservation of still images. Actually JPEG 2000 is used in project National digital library as archival master for images created during digitization of library collections. In the text the format is briefly introduced, then focusing on its profile parameters, on tools able to work with the format and especially text focuses on use of the format in important foreign institutions with aim to show, that it is suitable and in use archival format.