File Type Generic IconJPEG 2000 Image
File Format Standard (developed by Joint Photographic Experts Group)
Usage Referenced by an application; not meant to be opened manually; may run a program or script when opened
Popularity ★ ★ ☆ ☆ ☆  Uncommon

The ".j2k" extension is used by Joint Photographic Experts Group (JPEG) 2000 files. The JPEG 2000 format uses wavelet-based image compression and stores metadata as XML instead of EXIF data.

JPEG 2000 files can be viewed in most modern image viewers, though they are still not as common as standard .JPG files. While JPEG 2000 files may be saved with a ".j2K" extension, they typically have either a .JP2 or .JPX extension.

Open With

IconCorelDRAW Graphics Suite

IconCorel PaintShop Pro

IconAdobe Photoshop


IconApple Preview

IconLemkesoft GraphicConverter

IconAdobe Photoshop

Updated June 5, 2009
Information from the PC File Extensions Reference