UPX
by Markus F.X.J. Oberhumer
A free, portable, extendable, high-performance executable packer for several different executable formats
Operating system: Windows
Publisher: Markus F.X.J. Oberhumer
License: Open source (GPL-2.0-or-later)
Antivirus check: VirusTotal report
UPX is a free, open-source command-line program that packs executable files, after which they typically take 50-70% less space on your computer's hard drive, and at startup are unpacked directly into the computer's memory.
The UPX program supports a large number of file formats, including COM, EXE and SYS for DOS and EXE and DLL files for Windows.
UPX significantly reduces the space executable files occupy on your computer's hard drive.
Windows (32-bit or 64-bit)
PROS
Efficiently compresses executable files to save storage space.
Fast decompression without memory overhead for most formats.
Compatible with different system architectures and platforms.
Fast decompression without memory overhead for most formats.
Compatible with different system architectures and platforms.
CONS
Does not support all executable file formats.
Some antivirus programs flag packed files.
Command-line only, with no graphical interface.
Some antivirus programs flag packed files.
Command-line only, with no graphical interface.
UPX 2.4
(6.11 MB)
