Keystone Assembler Engine

Health v2 · maintenance only

Adoption not part of the score

2625 stars · 536 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Keystone is a lightweight multi-platform, multi-architecture assembler framework implemented in C/C++ with bindings for many languages. It supports assembling instructions for Arm, Arm64, Hexagon, Mips, PowerPC, Sparc, SystemZ, X86, RISC-V, and Ethereum VM, and is based on LLVM.

Use cases

• assemble machine code for arm64 from assembly text
• patch binary instructions during reverse engineering
• generate shellcode for x86-64 in a security tool
• assemble mips or powerpc instructions in an emulator or fuzzer
• integrate an assembler into a python or rust exploit-development toolkit
• assemble risc-v or evm instructions programmatically

When to choose

• you need a lightweight, thread-safe assembler library with a simple architecture-neutral API
• you need multi-architecture assembly from C/C++ or via bindings in Python, Go, Rust, Java, and more
• you are building reverse-engineering, binary-patching, or exploit-development tooling

When to avoid

• you need a full toolchain with linking and object-file output rather than instruction assembly
• you need a disassembler - use Capstone instead
• your project cannot accept GPL-2.0 licensing and you cannot obtain a commercial license

Facets

library · maturity active

compiler security reverse-engineering developer-tools security reverse-engineering developer-tools compilers windows bsd cross-platform python go rust jvm dotnet ruby assembler multi-architecture llvm-based arm arm64 x86 mips sparc powerpc risc-v evm hexagon systemz bindings keystone linux macos nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="keystone-engine/keystone")