A ZIP file is a compressed file that is used to compress various other files and folders in a single file. It is used in reducing the size of the file(s). Also, it is pretty handy when you have to send some data over the Internet as it takes less time to get uploaded and sent to the intended recipient. However, at times the ZIP files get corrupt when you download them over the Internet. There are other reasons of ZIP file corruption as well such as human errors, virus infections, abrupt system shutdown, file media error, etc. It may be noted that there is no in-built utility to repair a corrupted ZIP file. So, in such cases you should use third-party ZIP repair software to repair corrupt ZIP file.
Consider a scenario wherein you have to upload a ZIP file on the website of your organization, which contains the images of an office function. You test the ZIP file before uploading. As it is working fine, you upload it on the FTP server. However, after uploading the file when you download it at your home the ZIP file is found to be corrupt.
Cause:
The root cause of the ZIP file corruption is that it may have got corrupt while uploading it to the FTP server.
Resolution:
First of all, there is a precaution that you must take so that this issue is not raised again. You should always go for the Binary mode for an FTP transfer rather than the Text or ASCII transfer. The reason behind this is that the Binary mode supports the transfer of images, and is the most preferred mode for FTP transfers. Whereas the ASCII mode is used only for the text transfer as it converts the data into 8-bit ASCII codes.
As mentioned, there is no in-built utility to repair a ZIP file. So, in such cases you should use third-party ZIP recovery software to repair the corrupted ZIP file. Such read-only tools are able to repair ZIP file using fast yet sophisticated scanning algorithms.
Stellar Phoenix ZIP Recovery is ZIP repair software that enables you to repair ZIP file that can scale up to 800 MB. It is able to repair the zipped files created in WinZip from 5.0 to 12.1 versions. In addition, this ZIP recovery tool is capable of repairing the password-protected ZIP files created in WinZip from 5.0 to 8.1 versions. It is compatible with Windows 7, Vista, Server 2003, XP, and 2000.