There are 7 other file types using
the CLS file extension!

empty icon.cls - ArcView geocoding classification

empty icon.cls - JavaScript class definition

cls icon.cls - Microsoft Visual Basic 4 class module add-in

cls icon.cls - Microsoft Visual C++ class definition

cls icon.cls - AIM AOL Instant Messenger data

empty icon.cls - SQLite 3 data format

empty icon.cls - LaTeX data

Bookmark & share this page with others:

CLS file extension - Java class definition

What is cls file? How to open cls files?

File type specification:

Source code and script file type icon Source code and script file type

The cls file extension is associated with the Java, a programming language and run-time environment available for various platforms, developed by Oracle.

The cls file contains class definition for Java.

The default software associated to open cls file:

Java Development Kit (JDK) icon

Oracle Corporation logoJava Development Kit (JDK)  Multiplatform software

Company or developer:
Oracle Corporation

 JDK is a development environment for building applications, applets, and components using the Java programming language.

Java icon

Oracle Corporation logoJava  Multiplatform software

Company or developer:
Oracle Corporation

Java is a set of developing applications and specifications used to create software in Java programming language. Java is used on many computing platforms from desktop computers to mobile phones.

Java source code derives much syntax from C and C++ programming language but has a simpler object model. To run applications written in Java the Java runtime environment must be installed on a device.

Help how to open:

Use any Java IDE to open *.cls files.

How to convert:

There is no way how to convert *.cls files to other formats.

List of software applications associated to the .cls file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open cls file, edit cls file, convert cls file, view cls file, play cls file etc. (if exist software for corresponding action in's database).

Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting cls files.

Software that open cls file - Java class definition

Programs supporting the exension cls on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open cls file action.

Microsoft Windows:

Apple macOS / Mac OS X:


Previous file extension
CLS file extension > Source code and script file types

Next file extension
file extension CLU


Follow us!

Enter any file extension without dot (e.g. pdf)
Search for file extension details and associated application(s)

RSS feed