Zip Repair is a utility that will repair corrupt Zip files. Usually a corrupt Zip file gives the error message: ‘Cannot open file: it does not appear to be a valid archive’.

• Zip Repair creates an error free backup of your original file for instant access. No special skills required. A simple user interface with full install / uninstall support.
• Zip Repair will fix CRC errors in .zip files so that data can still be uncompressed
• Zip Repair supports spanned zip volumes. You can now repair and extract from a spanned zip set even if part of the set is missing.
• Full support for the Zip64 format
• Support for huge file sizes 2GB+ (as long as you have the disk space)

Free trial for Windows.