How to Fix the Archive is either in Unknown Format or Damaged

Effective ZIP file repair utility from Remo makes it simple and easy for you to fix any kind of Zip file errors with simple steps. Feel free to download Remo Repair ZIP and fix ZIP file issues with ease now!


Why Zip file displaying error - the archive is either in unknown format or damaged?

Generally, Zip files are used to backup, store and transfer large size files in compressed form. Like other files, Zip archives are also prone to some logical glitches and show error message stating “the archive is either in unknown format or damaged”. The main reasons behind this error could be the incompatibility between the version of operating system and the WinZip application that you have installed on your computer.  Sometimes, corruption in Zip file due to software conflicts, improper download or damaged header might become the cause for Zip file error.

Simplest solution to fix Zip file error the archive is either in unknown format or damaged

If you have damaged Zip file and don’t have any idea on how to fix Zip file error- the archive is either in unknown format or damaged, then opt Remo Repair ZIP software. It will effectively repair damaged .zip files that throws error messages while extracting it. By using this application, you can even fix error the compressed zipped folder is invalid in just couple of mouse clicks.

4 Steps to fix Zip file error - the archive is either in unknown format or damaged

Click Download button to get the demo edition of Remo Repair ZIP tool for free and install it to your Windows desktop / laptop. Here is the detailed guide to fix Zip archive is either in unknown format or damaged error by yourself.


Step 1: Launch Remo Repair ZIP and select damaged Zip archive using “Browse” option, then click on “Repair” button

Browse inaccessible Zip file and click Repair

Step 2: The software automatically starts fixing Zip file issues which you can monitor by looking at the progress bar

View ZIP repair process

Step 3: Once the selected Zip file is repaired successfully, you can “Preview” the list of files and folders available in the fixed Zip file

Preview repaired ZIP file

Step 4: Click on “Browse” to select the destination path of your choice and click “Save” button to store the repaired Zip archive

Save repaired ZIP file


Remo Repair ZIP tool comes in handy in all the following scenarios

There can be numerous reasons which may leave a Zip archive in damaged or corrupt state. Some common causes for Zip file corruption are mentioned below:

  • If Zip file is severely infected by harmful viruses, it may also get damaged and becomes inaccessible.
  • Zip file refuses to open and throws error messages if the header is corrupted badly.
  • Usage of unknown compression methods to compress Zip files also leads to Zip file corruption and hence display unknown errors

Whatsoever, might be the reason behind Zip file corruption, Remo Repair ZIP tool fixes the issues with utmost ease. The interactive user friendly interface allows users even with less technical knowledge to operate and repair inaccessible Zip archive without any obstacles now.

Key characteristics of Remo Repair ZIP software

  • Easily fixes all kinds of ZIP and ZIPX files which are 32-bit / 64- bit
  • Fixes broken or corrupted Zip files that are stored on any storage media such as hard drive, USB flash drive, pen drive and so on
  • Capability to repair Zip archives with CRC errors
  • Non-destructive, read-only software which makes sure that your original Zip file is intact
  • Smoothly repairs large Zip file which are more than 4GB in size
  • Supports all latest versions of Windows operating system including Windows 10 OS
  • Round the clock free technical support is provided to assist you when you need any help