# open-obfuscator/o-mvll

:electron: O-MVLL is a code obfuscation tool based on LLVM for native code (Android and iOS).

Repository: https://github.com/open-obfuscator/o-mvll
Canonical: https://ross.abutalabs.com/products/o-mvll
Homepage: https://obfuscator.re/omvll
Language: C++
License: Apache-2.0
License Family: permissive
Topics: android, ios, llvm, obfuscator, obfuscator-llvm
Last push: 2026-09-02T10:00:08+00:00

## Health v2 (maintenance only)
Score: 97/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 92, longevity 100
- inputs: {"age_days": 1431, "days_push": 0, "days_rel": 58, "gap_med": 28.0, "n_releases_24m": 11}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1129, forks 153 (observed 2026-09-03T02:15:15.707268+00:00)

## What it is
O-MVLL is an LLVM-based code obfuscator for native code that integrates with Clang and the Swift compiler via the LLVM pass manager, with obfuscation rules driven by a Python API. It targets Android NDK and iOS toolchains on AArch64 and ARM architectures with passes like control-flow flattening, anti-hooking, and string encoding.

## Use cases
- obfuscate native C/C++ code in an Android NDK app
- protect iOS Swift and Objective-C binaries from reverse engineering
- flatten control flow of sensitive functions like password checks
- hide or encode strings in compiled native binaries
- add anti-hooking protections to mobile app native libraries
- selectively obfuscate functions via a Python configuration

## When to choose
- you build mobile apps with native code and need reverse-engineering protection
- you want LLVM-pass-based obfuscation configurable in Python
- you target AArch64 or ARM on Android or iOS

## When to avoid
- you need obfuscation for desktop x86 binaries or non-LLVM toolchains
- you only need Java/Kotlin/Dart-level code protection
- you require a fully turnkey app-shielding solution without compiler integration

## Facets
- artifact type: library
- maturity: active
- function: security, compiler, cryptography
- domain: security, mobile-development, compilers, reverse-engineering
- platform: cpp, python, cross-platform
- tags: llvm, code-obfuscation, clang-plugin, android-ndk, swift-compiler, native-code-protection, control-flow-flattening, anti-hooking, android, ios

## Member repositories
- open-obfuscator/o-mvll (main) score 97

## Provenance
- Observed fields: from GitHub, fetched 2026-09-03T02:15:15.707268+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T06:40:57.213533+00:00, confidence not recorded.
  - readme: https://github.com/open-obfuscator/o-mvll (fetched 2026-09-03T02:15:15.707268+00:00, sha 14296db36f08)
  - homepage: https://obfuscator.re/omvll (fetched 2026-08-29T12:44:29.300631+00:00, sha 042804b63d67)
  - site_page: https://obfuscator.re/omvll/introduction/getting-started (fetched 2026-08-29T12:44:29.303112+00:00, sha 4d25ad8216d8)
- Data as of 2026-08-30T08:39:29.467469+00:00.