J2K File - opening and understanding

Did your computer fail to open a J2K file? We explain what they are used for and recommend software that we know can open or otherwise handle your .J2K files.

What is a J2K file?

The .j2k file extension is a raster bitmap image file type that is used by Joint Photographic Experts Group (JPEG) 2000 files. The JPEG 2000 format uses wavelet-based image compression instead of the DCT (Discrete- Cosine- Transform) compression and stores metadata. The metadata or the description information of the .j2k file is coded in XML as compared to the standard .jpeg or .jpg format that are basically formatted with EXIF data.

JPEG 2000 files are saved with a .j2k extension but typically, they can also be in either JP2 or JPX extension. For Windows, JPEG 2000 files can be open using the most popular image viewers and editors like the ones pioneered by Adobe and Corel. Though they are still not as common as standard JPG files, J2K files can support 16-bit color, alpha transparency, and lossless compression.

For Mac users, they can view and/ or edit the .j2k files by utilizing the following software: ToyViewer, Lemkesoft GraphicConverter, Adobe Photoshop CC 2015, Adobe Photoshop Elements 14, and Apple QuickTime Player.

How to open J2K files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension J2K for different purposes. We have identified 1 J2K opener for Windows that is compatible with this specific type of J2K file.

Programs that open these files

ACDSeeACDSeeVerified
We have not yet verified any programs for Mac that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!
We have not yet verified any web services that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Suggest another file format using extension J2K

While we know of one file format using the .J2K file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .J2K file.

Various viewers for this file format

These apps are known to open certain types of J2K files. Remember, different programs may use J2K files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Free File ViewerFree File ViewerUser submitted
IrfanViewIrfanViewUser submitted
HoneyView3HoneyView3User submitted
HoneyviewHoneyviewUser submitted
Paint Shop ProPaint Shop ProUser submitted
AVS Photo EditorAVS Photo EditorUser submitted
Ashampoo Photo CommanderAshampoo Photo CommanderUser submitted
Photo Pos ProPhoto Pos ProUser submitted
Corel PaintShop ProCorel PaintShop ProUser submitted
Zoner Photo StudioZoner Photo StudioUser submitted
We have not verified any software that we know for certain will work with J2K-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with J2K-files. If you know one, please use the 'Suggest a program' link below and tell us about it!