I have a ZIP file (created by Info-ZIP on Linux) and I want to make it as small as possible. I have lots of CPU time to burn on the recompression. I already know advzip, and it managed to reduce the size of my ZIP file by 5%. Is there another tool I should try? I would prefer free tools.
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closed as off-topic by DavidPostill, Nifle, random♦ Jan 10 at 21:43
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Try this tool I wrote called Leanify.
It will not only recompress zip file but also try to optimize supported files inside zip.
I use this batch script on the folder I want to archive:
Now choose which file is smaller - !archive.zip or !archive2.zip. In some rare situations the mixing of resulted arhives might give a smaller file (few bytes).
Also the final compressed optimised kzip archive might be mixed (use zipmix) with a 7zip archive (after deflopt+advzip+deflopt). Settings for 7zip I use: