Java Class File

Writable

other

A file containing Java bytecode that can be executed on the Java virtual machine (JVM). A Java class file is usually generated by a Java compiler from a Java programming language source code file. Java is a high-level, class-based, object-oriented general-purpose programming language designed to have as few implementation dependencies as possible.

Identify it

Extensions	`.class`
MIME types	`application/javaapplication/java-byte-codeapplication/java-vmapplication/x-httpd-javaapplication/x-javaapplication/x-java-classapplication/x-java-vm`
Signatures	`cafebabe` at byte 0 (Java Class File)
PRONOM	`x-fmt/415`
Wikidata	`Q2193155`

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Open it

javacOpen sourcewrites · GNU General Public License
XRubyOpen sourcewrites · BSD licenses
Apache TikaOpen sourcereads · Apache Software License 2.0
PhotoRecOpen sourcereads · GNU General Public License
CodeWarrior Debuggerreads
JADreads
PuriFilereads

Convert it

No conversion recorded. One of the tools above may export it; search for a chain.

Documentation

kaitai grammar: https://github.com/kaitai-io/kaitai_struct_formats/blob/master/executable/java_class.ksy

Sources

From Kaitai Struct format gallery, PRONOM, Wikidata. Updated 2026-10-24.

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