You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.

2.5 KiB

Keystone Engine

Build Status Build Status Build status

Keystone is a lightweight multi-platform, multi-architecture assembler framework. It offers some unparalleled features:

  • Multi-architecture, with support for Arm, Arm64 (AArch64/Armv8), Ethereum Virtual Machine, Hexagon, Mips, PowerPC, Sparc, SystemZ & X86 (include 16/32/64bit).
  • Clean/simple/lightweight/intuitive architecture-neutral API.
  • Implemented in C/C++ languages, with bindings for Java, Masm, C#, PowerShell, Perl, Python, NodeJS, Ruby, Go, Rust, Haskell, VB6 & OCaml available.
  • Native support for Windows & *nix (with Mac OSX, Linux, *BSD & Solaris confirmed).
  • Thread-safe by design.
  • Open source - with a dual license.

Keystone is based on LLVM, but it goes much further with a lot more to offer.

Further information is available at


Keystone is available under a dual license:

  • Version 2 of the GNU General Public License (GPLv2). (I.e. Without the "any later version" clause.). License information can be found in the COPYING file and the EXCEPTIONS-CLIENT file.

    This combination allows almost all of open source projects to use Keystone without conflicts.

  • For commercial usage in production environments, contact the authors of Keystone to buy a royalty-free license.

    See LICENSE-COM.TXT for more information.

Compilation & Docs

See file for how to compile and install Keystone.

More documentation is available in docs/


Contact us via mailing list, email or twitter for any questions.


Keystone is impossible without generous support from our sponsors. We cannot thank them enough!

CREDITS.TXT records other important contributors of our project.

If you want to contribute, please pick up something from our Github issues.

We also maintain a list of more challenged problems in a TODO list.