Kaitai Struct Compiler

Kaitai Struct Compiler is a tool that generates parsers for binary data formats from a declarative YAML or JSON definition (KSY format). Current stable version is 0.11.0, released September 2025. It supports multiple target languages including C++, C#, Java, JavaScript, Python, Ruby, Rust, and Go. The compiler is part of the Kaitai Struct ecosystem, which provides a language-agnostic way to describe binary formats and then compile those descriptions into efficient, reusable parsers in various programming languages. Unlike hand-written parsers, Kaitai Struct ensures consistency across languages and reduces maintenance overhead. The compiler is distributed as a standalone JAR file, available via releases on GitHub.