UPX - a powerful executable packer Icon

UPX - a powerful executable packer

4.7 Stars (14)
114 Downloads (This Week)
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IMPORTANT NEWS: UPX has moved to GitHub



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User Ratings

ease 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
features 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
design 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 3 / 5
support 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 4 / 5
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User Reviews

  • 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5

    Many people of the BlitzMax community recommended me to use UPX to save diskspace of my executable files my projects have, so I did. It's been a big deception from the start. Sure, nothing wrong with the compression ratio, but many programs refused to work properly after being packed by UPX, lots of them didn't even work at all. I gave it more chances hoping upgraded versions would ease the pain, but nothing. I guess I can't blame them. I've seen commercial programs like these suffer from the same issues. The only thing I could do was recompile my programs and tadaa, trouble gone. I guess the entire concept of executable packing just wasn't meant to be. And besides, the big issue with disk space is most often not coming from the executable files anyway, so why bother......

    Posted 12/30/2013
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Additional Project Details

Intended Audience

System Administrators, Developers, End Users/Desktop

User Interface


Programming Language

C++, Assembly



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