How can I open (or repair) corrupted ZIP files on Windows?
Is there a way to force 7-Zip to open them?
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That said, depending on how corrupt the file is, you may not have that much success with getting all of the files out in their proper condition. You will probably not be able to get all your files out (if at all).
IZArc is also able to open/repair corrupt archives and it is freeware.
If 7-zip cannot get all the files, I'd try with
joshhunt's Zip Repair reference.
Please do tell if you get more data extracted from a broken archive compared to that extractable by 7-zip.
It bears pointing out that the regular ZIP command in the Info-ZIP distribution has an
-F option to attempt to repair broken archives.
http://computers.tutsplus.com/tutorials/how-to-repair-damaged-zip-files-with-terminal--mac-49294 shows how to use it on a Mac, but Unix will be identical, and Windows fairly similar (if you have the WinZip command-line version; look for