>> 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.

6 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)

Abbreviation files
- / -
CLASS Group Abbreviation related extensions:
Dagger Group Abbreviation
Reunion for Windows Backup File
Black Rider Group Abbreviation
RELOADED Group Abbreviation
LOL Group Abbreviation
Ziff Davis 3D WinBench Batch

.cls - Visual Basic Class Module

The CLS development files are related to Visual Basic. 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.

Visual Basic
Development files
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Visual Basic Class Module related extensions:
MegaZeux Board Data
MegaZeux World
Twig Template
F2PY Signature File
Microsoft Frontpage Website Template

.cls - ArcInfo Geocoding Classification Data

The CLS gis files are related to ESRI ArcInfo. CLS file is an ArcInfo Geocoding Classification Data. ArcInfo is a complete and extensible geographic information system.

ESRI ArcInfo
GIS files
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ArcInfo Geocoding Classification Data related extensions:
NADCON Latitude Seconds Data
NADCON Longitude Seconds Data
MapInfo Interchange Format Data
ArcInfo Shadeset Symbol Data
Digital Line Graph Data
ArcInfo Markerset Symbol Data

.cls - LaTeX Document Class Data

The CLS data files are related to teTeX. CLS file is a LaTeX Document Class Data. LaTeX is a high-quality typesetting system, with features designed for the production of technical and scientific documentation. LaTeX is the de facto standard for the communication and publication of scientific documents.

Data files
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LaTeX Document Class Data related extensions:
LaTeX Auxiliary Data
BibTeX Bibliographic Reference
BibTeX Document
BibTeX Document Style
LaTeX Font Encoding Data
TeX Font

.cls - AOL Instant Messenger Class Data

The CLS data files are related to AOL Instant Messenger. CLS file is an AOL Instant Messenger Class Data. AOL Instant Messenger (AIM) is an advertisement-supported proprietary instant messaging and presence computer program which uses the OSCAR instant messaging protocol and the TOC protocol to allow registered users to communicate in real time.

AOL Instant Messenger
Data files
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AOL Instant Messenger Class Data related extensions:
OrangeCD Theme Data
Microsoft Windows Installer Rollback Data
Cool Music Card Data
RSView Machine Edition Tag Cache
File Warden Data
Vue Vegetation Data

.class - Java Class Data

The CLASS application files are related to Java Runtime Environment. CLASS file is a Java Class Data. CLASS file contains bytecodes for the Java Virtual Machine. Java is a class-based, object-oriented programming language that is designed to have as few implementation dependencies as possible.

Java Runtime Environment
Application files
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cla, clas, cls
Java Class Data related extensions:
Raynerboss Executable
Hue and Cry Photoshop Plug-in
Windows CE Executable
Flexify Photoshop Plug-in
India Ink Photoshop Plug-in
Unix Executable File

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:

c1s, cis, cks, cl, cl5, clc, cle, clw, clx, clz, cms, cos, cps, cs, csl

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Downloadable Sounds File
Microsoft Excel Worksheet
Lightscape Solution File
Casio WK-3000 Song Sequencer
Capture One Settings
LayaAir Scene Data

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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