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Basic information about CLS file

When there is a problem with opening files with the file extension CLS（*.CLS or *.cls）, you do not need a computer expert. In most cases, using the helpful suggestions of experts contained in our website as well as appropriate programs, you can solve the problem with the CLS file yourself.

There are 9 file types using the CLS file extension in our database. In the further part of this page, you will find detail information about all the CLS file with their brief description and a list of programs that support CLS file sorted by operating systems. The table below provides useful information about the CLS file extension. It answers questions such as:
  • What is the CLS file?
  • How to open a CLS file?
  • What programs do I need to open a CLS file?
  • What programs help to create and edit a CLS file?
  • How to convert CLS files to another file format?
  • How to convert another files to CLS file format?


1.Detail information about CLS file extension: LaTeX Document Class File

File type LaTeX Document Class File Category Misc Files
Developer N/A File format Text
Description CLS file is a LaTeX Document Class File. File written in LaTeX, a document markup language often used for typesetting academic papers; stores a class with a predefined typeset configuration that can be imported into a .TEX document; used for storing templates for articles, forms, and other types of documents.
Software programs that will open, edit or convert CLS files

Windows		 TeXnicCenter
TeXworks
MiKTeX
proTeXt
Texmaker

macOS		 TeXworks
LyX/Mac
Texmaker
TeXShop

Linux		 TeXworks
Texmaker


2.Detail information about CLS file extension: Program Class File

File type Program Class File Category Developer Files
Developer N/A File format N/A
Description CLS file is a Program Class File.
Software programs that will open, edit or convert CLS files

Windows		 Microsoft Visual Studio 2017


3.Detail information about CLS file extension: ArcView Geocoding Classification File

File type ArcView Geocoding Classification File Category GIS Files
Developer N/A File format N/A
Description CLS file is a ArcView Geocoding Classification File.
Software programs that will open, edit or convert CLS files

Windows		 ArcGIS for Desktop Basic (ArcView)


4.Detail information about CLS file extension: JavaScript Class Definition

File type JavaScript Class Definition Category Developer Files
Developer N/A File format N/A
Description CLS file is a JavaScript Class Definition.
Software programs that will open, edit or convert CLS files

Windows		 Sublime Text
Atom
NotePad++ text editor
PSPad

macOS
 Sublime Text for Mac
Atom for Mac

Linux		 Sublime Text for Linux
Atom for Linux


5.Detail information about CLS file extension: Microsoft Visual Basic 4 Class Module Add-in

File type Microsoft Visual Basic 4 Class Module Add-in Category Developer Files
Developer N/A File format N/A
Description CLS file is a Microsoft Visual Basic 4 Class Module Add-in.
Software programs that will open, edit or convert CLS files

Windows		 Microsoft Visual Basic


6.Detail information about CLS file extension: Microsoft Visual C++ Class Definition

File type Microsoft Visual C++ Class Definition Category Developer Files
Developer N/A File format N/A
Description CLS file is a Microsoft Visual C++ Class Definition.
Software programs that will open, edit or convert CLS files

Windows		 Visual C++
Microsoft Visual Basic


7.Detail information about CLS file extension: AIM AOL Instant Messenger File

File type AIM AOL Instant Messenger File Category Data Files
Developer N/A File format N/A
Description CLS file is a AIM AOL Instant Messenger File.
Software programs that will open, edit or convert CLS files

Windows		 AOL Instant Messenger (AIM)


8.Detail information about CLS file extension: SQLite 3 File

File type SQLite 3 File Category Database Files
Developer N/A File format N/A
Description CLS file is a SQLite 3 File.
Software programs that will open, edit or convert CLS files

Windows		 SQLite

macOS
 SQLite for Mac

Linux		 SQLite for Linux


9.Detail information about CLS file extension: Java Class Definition

File type Java Class Definition Category Developer Files
Developer N/A File format N/A
Description CLS file is a Java Class Definition.
Software programs that will open, edit or convert CLS files

Windows		 Eclipse

macOS
 Eclipse for Mac

Linux		 Eclipse for Linux



Can't open a CLS file?

When you click a file to open it, operating system examines the filename extension. If operating system recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When operating system does not recognize a filename extension, you receive the following message:

”Can't open this file: example.CLS”。

To open this file, you install one of the applications from the list of software programs that you found here, you should be able to open, edit or convert the file with the CLS extension without any issue.


Where I can download the application that support CLS file?

If you do not know where you can download the application from our list, click on the link (which is the name of the program), you will find more information there on the location where to download the required application. Most often they are the websites of software manufacturers.


How to change file associations?

  • Right-click a file with the extension whose association you want to change, and then click "Open With".
  • In the "Open With" dialog box, click the program whith which you want the file to open, or click "Browse" to locate the program that you want.
  • Select the ”Always use the selected program to open this kind of file” check box.


Can I change the extension of CLS files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read/open the file. The problem is, changing the file extension does not change the file format. Select a software program from our list and install it on your computer. If the file has not opened correctly, you have to look for a different software program from our list. Sometimes you have to repeat the operation several times.


What else may cause problems width open a CLS file?

The reasons for the lack of the ability to open a CLS file on your computer may be at least several. The easiest thing is to find a suitable application installed on your computer, which will open a CLS file. If there is still something wrong, you might want to check:

  • Whether the CLS file is damaged.
  • Whether the CLS file is incorrectly linked in the registry entries.
  • Whether the CLS file extension has been accidentally removed from the Windows registry.
  • Whether the installation of an application that supports the CLS file format is incompletely.
  • Whether the CLS file is infected.
  • Whether the drivers of the equipment used for opening a CLS file are up to date.
  • Whether your computer has enough hardware resources to open a CLS file.

If the CLS file still not working with your software after eliminating the above shortcomings? That means that the problem is more complex and requires the help of a specialist.