Filename Extensions
If you are seeking information about file extensions, then you are in the right place at right time.

Details of extension .cls

3 extension(s) and 1 alias(es) in our database

Below, you can find answers to the following questions:

  • What is the .cls file?
  • Which program can create the .cls file?
  • Where can you find a description of the .cls format?
  • What can convert .cls files to a different format?
  • Which MIME-type is associated with the .cls extension?
CLASS Group Abbreviation .cls file icon

CLASS Group Abbreviation

CLS isn't filename extension, it is the abbreviated name of release group. (iMMERSiON)
Detailed description not available
Category: Abbreviation files
Application: -
Program name: -
Mime-type: none
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
LOL Group Abbreviation
FAiRLiGHT Group Abbreviation
DEViANCE Group Abbreviation
iMMERSiON Group Abbreviation
RELOADED Group Abbreviation
Black Rider Group Abbreviation
Razor 1911 Group Abbreviation
Dagger Group Abbreviation
Visual Basic Class Module .cls file icon

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.
Category: Development files
Application: Visual Basic
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
Visual Basic Project
Visual Basic PDW Script
Visual Basic Binary Property Page File
Visual Basic Property Page File
Visual Basic ActiveX Document Form
Visual Basic ActiveX Document Binary Form
Visual Basic Control TypeLib Cache
Visual Basic Control Licensing File
Visual Basic Wizard Launch File
ArcInfo Geocoding Classification Data .cls file icon

ArcInfo Geocoding Classification Data

CLS file is an ArcInfo Geocoding Classification Data. ArcInfo is a complete and extensible geographic information system.
Detailed description not available
Category: GIS files
Application: ESRI ArcInfo
Program name: -
Mime-type: application/octet-stream
Magic bytes (HEX): -
Magic string (ASCII): -
Related extensions:
ArcInfo Binary Coverage
ArcInfo Band Interleaved by Line Image
ArcInfo Band Interleaved by Line Image
ArcInfo Band Sequential Image
ArcInfo ASCII Export
Geography Markup Language Document
MapInfo Table Document
FME Document
FME Feature Store
Java Class .class file icon

Java Class

CLASS files contain bytecodes for the Java Virtual Machine, Tthey are normally produced by a compiler for the Java programming language.
Category: Application files
Program name: -
Mime-type: application/java-vm
Magic bytes (HEX): -
Magic string (ASCII): -
cla, clas, cls
Related extensions:
Java Source Code
JRun Server Application
Java Enterprise Archive
BlackBerry COD Archive
Java Serialized Object
Velocity Macro File
JBuilder Project
JavaCard Converted Applet
Tag Library Descriptor

Other types of files may also use the .cls file extension. If you have helpful information about .cls extension, write to us!

Is it possible that the filename extension is misspelled?

We found the following similar extensions in our database:

WinFlash Flashcard Source
Creator Fault List File
Capture One Photo Cache Data
Connection Manager Service Provider Data
Alstom MMS LCS Compiler Report
Visual Studio ClassWizard Data
Downloadable Sounds File
Carlson Survey Centerline File
Adobe Encore Color Set

The .cls filename extension is often given incorrectly!

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

fls (22), lcs (1), c1s (1), dls (1), cs (1), cos (1), clz (1), clw (1), clc (1), vls (1), cl (1), ls (1), cis (1), csl (1), cps (1)

Can't open a .cls file?

If you want to open a .cls file on your computer, you just need to have the appropriate program installed. If the .cls association isn't set correctly, you may receive the following error message:

Windows can't open this file:

File: example.cls

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 from a list of programs that are installed on your computer.

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.

Supported operating systems

Windows Server 2003/2008/2012/2016, Windows 7, Windows 8, Windows 10, Linux, FreeBSD, NetBSD, OpenBSD, Mac OS X, iOS, Android

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