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Capstone Engine

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The master branch is deprecated. All forward development should be based on the next branch.

To clone a fresh checkout with the next branch:

git clone -b next

To change to the next branch in an existing checkout:

git checkout next

We moved the original historical repo of Capstone from to an organization, where we can add more maintainers to the project, and push Capstone development forward.

Our new home is

Nov 8th, 2021.

Capstone is a disassembly framework with the target of becoming the ultimate disasm engine for binary analysis and reversing in the security community.

Created by Nguyen Anh Quynh, then developed and maintained by a small community, Capstone offers some unparalleled features:

  • Support multiple hardware architectures: ARM, ARM64 (ARMv8), Ethereum VM, M68K, Mips, MOS65XX, PPC, Sparc, SystemZ, TMS320C64X, M680X, XCore and X86 (including X86_64).

  • Having clean/simple/lightweight/intuitive architecture-neutral API.

  • Provide details on disassembled instruction (called “decomposer” by others).

  • Provide semantics of the disassembled instruction, such as list of implicit registers read & written.

  • Implemented in pure C language, with lightweight bindings for D, Clojure, F#, Common Lisp, Visual Basic, PHP, PowerShell, Emacs, Haskell, Perl, Python, Ruby, C#, NodeJS, Java, GO, C++, OCaml, Lua, Rust, Delphi, Free Pascal & Vala (ready either in main code, or provided externally by the community).

  • Native support for all popular platforms: Windows, macOS, iOS, Android, Linux, *BSD, Solaris, etc.

  • Thread-safe by design.

  • Special support for embedding into firmware or OS kernel.

  • High performance & suitable for malware analysis (capable of handling various X86 malware tricks).

  • Distributed under the open source BSD license.

Further information is available at


See COMPILE.TXT file for how to compile and install Capstone.


See docs/README for how to customize & program your own tools with Capstone.


See HACK.TXT file for the structure of the source code.


This project is released under the BSD license. If you redistribute the binary or source code of Capstone, please attach file LICENSE.TXT with your products.

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