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

cls file icon.cls - ArcView geocoding classification file

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

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

cls file icon.cls - AIM AOL Instant Messenger file

cls file icon.cls - SQLite 3 file

cls file icon.cls - LaTeX file

cls file icon.cls - Java class definition

Bookmark & share this page with others:

CLS file extension - JavaScript 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 related to JavaScript, a scripting language most often used for client-side web development. It was the originating dialect of the ECMAScript standard.

It is a dynamic, weakly typed, prototype-based language with first-class functions. JavaScript was influenced by many languages and was designed to look like Java, but be easier for non-programmers to work with.

The cls file contains JavaScript class definitions.

The default software associated to cls file type:

Sublime Text icon

Sublime Text  Microsoft Windows software

Company or developer:
  Sublime HQ Pty Ltd

Sublime Text is advanced text editor used to write source codes in various programming languages. It is a great tool for programmers and offers great feature and performance. It is available for Microsoft Windows, Mac OS X and Linux operating systems.

Help how to open CLS files:

Use any text editing tool to view content of *.cls files.

How to convert file with extension CLS:

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, Mac OS X 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 of the cls files.

  • Open cls file
  • Save cls file
  • Edit cls file

Software that open cls file - JavaScript class definition

Click on the link to get more information about listed programs for open cls file action.

Microsoft Windows:

Main software associated with cls file by default:
Sublime Text small icon Sublime Text
Other suggested software:
Atom small icon Atom
NotePad++ text editor small icon NotePad++ text editor
PSPad small icon PSPad

Apple macOS / Mac OS X:

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

Next file extension
file extension CLS


Follow us!

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

RSS feed