UPXxShell 3.05 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
UPXxShell was developed to work on Windows XP, Windows Vista, Windows 7, Windows 8, Windows 10 or Windows 11 and can function on 32-bit systems. The most popular versions of the program 3.4, 3.0 and 1.4. The common filenames for the program's installer are rundll32.exe or UPXxShell.exe etc.
The program lies within System Utilities, more precisely Archivers. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. The actual developer of the free software is iont.
From the developer:
This program is an unofficial Windows GUI shell for UPX (Ultimate Packer for Executables).
UPX is used to compress executable files such as .exe .dll .sys and others. UPX is rated #1 in the ACT - EXE Packer Compression Test.
But unfortunately UPX is a console application and though the official GUI frontends are being developed now, until then you can use this Shell.
You may want to check out more software, such as SFV Checker, UnPacker or Zip Key, which might be related to UPXxShell.