Open CLASS file

CLASS files: what are they and how do I open them?

class file icon Are you facing difficulties opening unknown files on your computer, or wondering exactly what this file is?
We've got the information and best software solutions for opening these files effortlessly.

.class file type #1: Java bytecode class

Files with class extension are mainly  related to the Java programming language and used for compiled Java source codes known as Class bytecode files.

Further details:

File extension class is commonly used for Java Classes.  In the Java programming language, source files (*.java files) are compiled into (virtual) machine-readable class files.

Since Java is a platform-independent language, source code is compiled into an output file known as bytecode, which it stores in a class file.

If a source file has more than one class, each class is compiled into a separate class file, which can be loaded by any Java Virtual Machine (JVM).

MIME types:

Open file with:

Java icon


Software set used to develop and run applications written in Java source code

Java Development Kit (JDK) icon

Java Development Kit (JDK)

A software used to develop Java applications and applets

Eclipse for Mac icon

Eclipse for Mac

A Mac version of popular IDE

Eclipse for Linux icon

Eclipse for Linux

A Linux version of popular development environment

Eclipse icon


A multi-language software development environment


Development environment for JAVA applications

.class file type #2: Gambas class source

A class file extension is related to the Gambas class source format. Gambas is development environment and programming language.

Further details:

Gambas is a full-featured object language and development environment built on a BASIC interpreter. It is released under the GNU General Public Licence.

Its architecture is largely inspired by Java. So Gambas is made up of:

  • A compiler.
  • An interpreter.
  • An archiver.
  • A scripter.
  • A development environment.
  • Many extension components.

Open file with:

Gambas icon


A free development environment based on a Basic interpreter

What is the meaning of a file extension?

File extensions are characters that appear after the dot in a computer file's name. For example, the file "unknown-file.class" has the file extension "class". This is used to identify which program should open the file or what file type it is.
File extensions help you organize and manage files. They provide a quick and easy way to identify and associate the file type with the appropriate software.

We can help you open your file

In our database, we have collected a huge number of different file extensions, detailed descriptions, and programs that can be used to open or otherwise work with the file extensions listed in our database.
This database is an invaluable resource for users who want to understand better file extensions and what they can do with them. It also allows users to know different file types with the same purpose.

Only verified software links are provided

We have verified every software listed in our database. The software listed in our database includes links to the developer's or software's website. These links should allow you to download the right program for each file type. Using verified software from reputable sources helps minimize the risk of malware and viruses infecting your computer.