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Last pushed: 3 years ago
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Go small or go home

Lets save the interweb, and make all binaries small. This tiny (1.1MB) Docker image
is a containerized upx.


You can compress your binary file as:

$ docker run -v $PWD:/data lalyos/upx mybinary

Go for even smaller

I was playing with the docker binary itself, and got it compressed under 1.5MB.
Shouldn’t it be the official release ;)

You can use all the available upx options, so if ypo have some time,
and want to create the smallest size, use --best --ultra-brute options:

$ docker run --rm -v $PWD:/data  lalyos/upx -k --best --ultra-brute docker

                       Ultimate Packer for eXecutables
                          Copyright (C) 1996 - 2013
UPX 3.91        Markus Oberhumer, Laszlo Molnar & John Reiser   Sep 30th 2013

        File size         Ratio      Format      Name
   --------------------   ------   -----------   -----------
   7474608 ->   1454080   19.45%   Mach/AMD64    docker

Packed 1 file.

The -k options is for keeping a backup from the original binary.


  • It is statically built with Alpine linux
  • compressed by itdelf (eat your own dogfood)
  • added into a custom scratch


If I’m getting too bored (unlikely in the coming weeks) i might create an
ordinary Alpine package for upx.

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