JLS File - opening and understanding

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

What is a JLS file?

A .JLS file is a JPEG-LS bitmap file. Through our analysis of JLS files, we know that one use of the format is JPEG-LS bitmap. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

How to open JLS 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 JLS for different purposes.

While we have not verified the apps ourselves yet, our users have suggested 3 different JLS openers which you will find listed below.

Suggest another file format using extension JLS

While we know of one file format using the .JLS 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 .JLS file.

Various viewers for this file format

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

IrfanViewIrfanViewUser submitted
XnViewXnViewUser submitted
SView5SView5User submitted
We have not verified any software that we know for certain will work with JLS-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 JLS-files. If you know one, please use the 'Suggest a program' link below and tell us about it!