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Methods to try fixing invalid Zip files with the command line add-on

Article ID: 126
Last updated: 30 Oct, 2013
Views: 159571

The WinZip Command Line Support Add-On contains functions that attempt to repair Zip files (.zip or .zipx). The appropriate versions are listed on and can be downloaded from the Alternative Download Links web page. If you are using a version earlier than WinZip 11.2, you can download the appropriate add-on version from the Legacy Download Links page. Access to a Command Prompt window will also be necessary.

Please do the following to attempt to repair a Zip file:

  1. Click Start, click All Programs, and click Accessories
  2. Right click Command Prompt and choose Run as administrator
  3. Change directories to the folder where the corrupted Zip file is located
  4. Type: "C:\Program Files\WinZip\wzzip" -yf zipfile.zip

If the corrupted Zip file is split or spanned, use the following command instead:

"C:\Program Files\WinZip\wzzip" -yfs zipfile.zip

WZZIP will create a new Zip file with a FIXED suffix in the file name. The original Zip file will not be modified. Only the data in the original Zip file is used.

The FIXED Zip file is structurally sound but the data may still be corrupt. WZZIP does not fix the zipped data itself. If the zipped data has a CRC error or the zipped data is corrupt, then the resulting fixed Zip file will still be corrupt.

If you continue to have problems or have questions email Technical Support.

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