Java class data
File type: Source code and script file, Dangerous and malicious file
A cla file contains compiled Java class data. It is an uncommon alternative to the standard .class file extension.
The data is intended for the Java platform rather than for direct editing as text.
Found 3 different file type records with the same cla filename suffix.
File type category:
Source code and script file
Dangerous and malicious file
Date updated: November 6, 2026
Java source files use the .java extension and are compiled into class files containing Java virtual machine bytecode. The standard extension for these files is .class; .cla is a very rare alternative extension for the same kind of class data.
A cla file can contain the compiled representation of one Java class, including the information required by the Java virtual machine to load and run it. Java class files are commonly used with other compiled classes and resources in applications and Java archives.
The Java platform is available on multiple operating systems. Because a cla file is not the normal Java class-file extension, Java tools and class loaders may require the file to be renamed to .class before they can use it. The extension itself does not establish that the contents are safe; untrusted Java bytecode should not be loaded or run.
The format is represented by the Java class-file format, but the cla extension is exceptionally uncommon. Associated MIME types include application/java, application/java-byte-code, application/octet-stream, application/x-java-class, and application/x-java.vm.
Java tools normally expect compiled class files to have the .class extension. Make a copy of the cla file and rename the copy to use .class, then place it in the appropriate classpath location or Java archive if it is a valid Java class file.
A Java development environment or the Java command-line tools can inspect or use the renamed file. A text editor is not suitable for reading its bytecode, and untrusted class data should not be loaded or executed.
A cla file does not normally need conversion to another format. If it contains valid Java class data, renaming it to use the standard .class extension is usually sufficient; this changes the filename, not the contents.
Java source code can be compiled into standard class files, but a cla file cannot generally be converted back into the original source code. Reconstructing source with a decompiler is a separate, potentially imperfect process rather than a normal format conversion.
Software applications that handle other tasks involving cla files:
Multiplatform
File type category:
Source code and script file
Date updated: November 8, 2018
Record marked as obsolete and not updated for a long time.
The cla file extension is used by Clarion. Old version of application used in MS-DOS. The cla file contains source code.
Most likely some old format without support. No further information could be found.
Software applications that can open cla files:
Microsoft Windows
Software applications that can edit cla files:
Microsoft Windows
Software capable of saving cla files:
Microsoft Windows
Software apps that create cla files:
Microsoft Windows
Software applications that handle other tasks involving cla files:
Microsoft Windows
File type category:
Various data file
Date updated: November 12, 2026
The Claymore file is associated with the Claymore program and stores links and other information used by that program. Its reported MIME type is application/vnd.claymore.
It is used as program data, rather than as a document for direct user access.
It is not possible to open a Claymore file manually; it is used by the Claymore software to handle its data.
Claymore files are not convertible to other formats; they are intended for use as Claymore program data.
English
application/vnd.claymore
