Having problems opening a J file?

We have programs that can open or convert your J files.

Opening J files

Did your computer fail to open a J file? We explain what J files are and recommend software that we know can open or convert your J files.

What is a J file?

Files that contain the .j file extension are most commonly used by the Java programming language. The J files that are used by this language contain the source code that has been written in Java. These files may contain the code for an entire software application or may consist of a single file that is referenced by another Java programming project.

The J files that are associated with JAVA are usually saved with the .java file extension, but the .j file extension can be used in lieu of the standard .java suffix.

The .j file extension is also used for the archive files that are created with the JAR archiving software.

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

About File Extension J

File.org aims to be the go-to resource for file type- and related software information. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files.

If you have additional information about the J file format or software that uses files with the J suffix, please do get in touch - we would love hearing from you.