UPX For Android NDK is a systemless binary utility compiled with the Android NDK by @JonesqPacMan. It injects the high-performance Ultimate Packer for eXecutables (UPX) into your terminal PATH, enabling developers and power users to compress ELF binaries, shared libraries, and native executables directly on Android without partition alterations.
High-Ratio Binary Packing
Compress native ARM and x86 ELF executables on-device with zero runtime memory overhead and automatic decompression.
Native ELF Compression
Reduces executable file sizes by 50% to 70% using advanced UCL and LZMA algorithms while keeping binaries fully self-executable.
Global Shell Integration
Automatically exposes the upx binary to /system/bin or /system/xbin, accessible across Termux, ADB Shell, or root terminal apps.
NDK Multi-Arch Build
Compiled with modern Android NDK toolchains, providing stable execution across arm64-v8a, armeabi-v7a, and x86_64 architectures.
Usage & Execution Flow
The UPX For Android NDK module operates systemlessly by binding the compiled binary into the execution path without touching real partitions. When executed, UPX packs the target binary by prepending an in-memory decompression stub, allowing the packed executable to extract itself directly in memory at runtime without additional dependencies.
.so), test compatibility with dynamic linkers across different Android API levels.