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>> CLS file

CLS file format description

Many people share .cls files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .cls file can be edited, converted or printed with. On this page, we try to provide assistance for handling .cls files.

3 filename extension(s) found in our database.

.cls - CLASS Group Abbreviation

CLS isn't filename extension, it is the abbreviated name of release group. (iMMERSiON)

.cls file format description:
CLS format description not yet available
Abbreviation files
- / -
CLASS Group Abbreviation related links:
CLASS Group Abbreviation related extensions:
Dagger Group Abbreviation
Reunion for Windows Backup File
Black Rider Group Abbreviation
RELOADED Group Abbreviation
LOL Group Abbreviation
Topocad Coordinate Data

.cls - Visual Basic Class Module

CLS file is a Visual Basic Class Module. Dynamic data structures generally consist of at least some simple data storage (in our case, it will be a class module), along with a linkage to the next element in the structure.

.cls file format description:
CLS format
Visual Basic
Development files
- / -
Visual Basic Class Module related links:
Visual Basic Class Module related extensions:
Visual Basic User Control Text
Visual Basic User Control Binary File
Visual Basic Active Designer Cache
Visual Basic ActiveX Document Form
Visual Basic ActiveX Document Binary Form
Visual Basic Designer File

.class - Java Class

CLASS files contain bytecodes for the Java Virtual Machine, Tthey are normally produced by a compiler for the Java programming language.

.class file format description:
CLASS format
Java Runtime Environment
Application files
- / -
cla, cls
Java Class related links:
Java Class related extensions:
Java Class
Java Archive
Java Network Launch Protocol Descriptor
Java Manifest File
Java Properties File
Java Web Archive

Naturally, other applications may also use the .cls file extension. Even harmful programs can create .cls files. Be especially cautious with .cls files coming from an unknown source!

Can't open a .cls file?

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

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .cls file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

vls, cis, ls, fls, csl, cps, cms, clw, cl5, xls, cks, sls, lcs, dls, cs

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

CheckInbox Settings
ClearSilver Template File
Capture One Settings
Visual Localize Script
Visual Studio ClassWizard Data
Light-O-Rama Compressed Sequence File

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