If instead of zip files you find a message saying "Cannot open file: it does not appear to be a valid archive", it means that the files are damaged and stand in need of zip repair. To fix the problem, open the files in Zip Repair Tool. The program features a sophisticated recovery algorithm that restores zip structure integrity and helps recover zip files with their contents. You can easily repair zip files of any size and number of volumes.
Publisher description
The zip file format offers much in terms of data storage and network transfer. Its potential weakness, however, lies in the fragility of the file structure. If for any reason some part of a zip file becomes damaged, standard zip tools will be unable to extract it. The cyclic redundancy check makes file extraction impossible if the CRC values of the original file and the extracted file don’t match. Zip Repair Tool provides the user with a cutting edge technology that helps repair zip structure and extract zipped files. Full automation of the zip repair process and a user-friendly interface make zip repair a snap. After the user locates zip files, the program scans each file to assess the damage. Then Zip Repair Tool deploys its robust engine to recover zip files wherever possible. High speed and accuracy are the distinguishing features of the technology. The zip repair engine can fix zip files of any size and number. Big files can exceed 4 Gb and can "span" multiple disks, but with Zip Repair Tool you can easily recover zip files of any size and number of volumes. The batch mode offers an additional benefit of automating zip repair on multiple files.
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