Description: UPX homepage: the Ultimate Packer for eXecutables
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UPX is a free, secure, portable, extendable, high-performance executable packer for several executable formats.
UPX is an advanced executable file compressor. UPX will typically reduce the file size of programs and DLLs by around 50%-70%, thus reducing disk space, network load times, download times and other distribution and storage costs.
Programs and libraries compressed by UPX are completely self-contained and run exactly as before, with no runtime or memory penalty for most of the supported formats.