Files that contain the .class file extension are primarily associated with files that have been written in the Java programming language. These files are compiled bytecode class applications. They are created by compiling different Java source code files.
The different Java source code files are compiled together to create the resulting CLASS file, which is then loaded into the Java Virtual Machine. At that point, the Java Virtual Machine executes the application that the code has been written for.
It is important to note that because there are different versions of the Java Virtual Machine, not all CLASS files will be compatible with each version.
Try a universal file viewer
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 CLASS file format or software that uses files with the CLASS suffix, please do get in touch - we would love hearing from you.