J2K File Type

- The quick facts

What are J2K files and how to open them

Are you having problems opening a J2K file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a J2K file?

A .J2K file is a JPEG 2000 Image 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 is basically formatted with EXIF data.

JPEG 2000 files are saved with a .j2k extension but typically, they can also use either a 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.

How to open J2K files

We have identified 5 J2K openers that are compatible with this specific type of J2K file.

Programs that open JPEG 2000 Image files

Bitberry File OpenerBitberry File OpenerVerified
Corel PaintShop ProCorel PaintShop ProVerified
XnViewXnViewVerified
IrfanViewIrfanViewVerified
ACDSeeACDSeeVerified

Last updated: March 26, 2022

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 apps that use files with this extension

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.

HoneyviewHoneyviewUser submitted
AVS Photo EditorAVS Photo EditorUser submitted
Ashampoo Photo CommanderAshampoo Photo CommanderUser submitted
Photo Pos ProPhoto Pos ProUser submitted
Zoner Photo StudioZoner Photo StudioUser submitted
Photomania DeluxePhotomania DeluxeUser submitted
PicosmosToolsPicosmosToolsUser submitted
John Paul Chacha's Chasys Draw IESJohn Paul Chacha's Chasys Draw IESUser submitted
John Paul Chacha's Chasys Draw IES ViewerJohn Paul Chacha's Chasys Draw IES ViewerUser submitted
WinCDEmuWinCDEmuUser submitted