Alpx is a simple UPX-based tool. From its simple interface, you can reduce the size of .exe, .dll, and .ocx executables so they take up less space. This file compression is possible without changing the files themselves too much, retaining their extensions and functionality as if they were the original files.
Alpx lets you manage the compression and decompression of the files you select, as well as the degree of compression.
The program is in German, but it can be changed to English in the Optionen
menu ('Options' in German). No installation required.