zyantific/zydis

Health v2 · maintenance only

Adoption not part of the score

4351 stars · 509 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Zydis is a fast, lightweight x86/x86-64 disassembler and encoder library written in C with zero dependencies, not even libc. It supports all Intel and AMD ISA extensions, is thread-safe, performs no dynamic memory allocation, and is used by major projects like Firefox, WebKit, and x64dbg.

Use cases

• disassemble x86-64 machine code in my application
• decode instructions for a debugger or profiler
• encode x86 instructions programmatically
• embed a disassembler in a kernel driver or UEFI environment
• analyze instruction register and flag access
• build a binary analysis or reverse-engineering tool

When to choose

• you need complete, correct x86/x86-64 ISA coverage including the latest extensions
• you need a dependency-free, small-footprint library usable in kernel mode or UEFI
• performance matters and you want fast decoding with rich per-instruction metadata
• you need both disassembly and encoding in one library

When to avoid

• you need disassembly for non-x86 architectures like ARM or RISC-V
• you want a high-level decompiler or disassembly framework with control-flow analysis rather than a raw decoding library
• your project is not C/C++ and you cannot use bindings

Facets

library · maturity active

parser developer-tools reverse-engineering developer-tools security reverse-engineering operating-systems cross-platform cpp c windows embedded disassembler x86 x86-64 encoder instruction-decoding no-dependencies kernel-mode binary-analysis linux macos

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