Have you ever encountered a situation where you downloaded a large RAR file & come across RAR tệp tin unknown format or damaged error message while extracting the file? The WinRAR application fails to open such damaged WinRAR archives. Whilst extracting a highly compressed RAR tệp tin inlớn a hard drive of low disk space the error “The archive sầu is either in unknown format or damaged” might pop-up unexpectedly & leads to corruption of the RAR tệp tin. In such undesirable conditions, you can simply make use of the WinRAR Repair tool lớn fix unknown format or damaged error with RAR files.

Possible Reasons behind RAR unknown format error

Improper RAR Archive Download: Whenever any interruptions occur during the RAR tải về process, there are high chances of archive sầu corruption messageSevere Virus Attacks: Due lớn severe virut or malware attacks can corrupt RAR files


One should maintain a proper backup of essential and very large-sized files on other storage devices. Besides, one can still re-tải về the entire RAR archive again if it is unavailable; there are chances of getting no errors.

Fixing WinRAR archive sầu is either in unknown format or damaged error

The WinRAR Repair is the ultimate tool khổng lồ fix RAR errors in simple clicks. It can fix RAR archives and restore its contents including documents, pictures, audio, video clip, etc. The intuitive sầu UI offers secure and convenient steps khổng lồ repair erroneous RAR files. The app performs RAR repair by applying a deep scan on the WinRAR file showing the archive sầu is either unknown format or damaged error.

WinRAR Repair software can be readily installed on all editions of Windows OS 10, 8, Vista, XP.., 2008, 2003, etc. Get detailed information about RAR repair on Windows 7 here- This award-winning software lớn fix the WinRAR archive sầu with a kích cỡ higher than 4GB. The WinRAR Repair utility also serves the best in resolving the CRC error with RAR, unexpected kết thúc of tệp tin error, filename too long error, no files to lớn extract error, and all other RAR errors. It is also capable khổng lồ efficiently repair RAR files that are encrypted.

Note: This tool also helps you to lớn persize uncompressed AVI tệp tin repair which causes errors in playing videos.

Easy Steps khổng lồ Fix RAR Files After WinRAR Says File Unknown Format or Damaged

Step 1: Install the software on your system và launch it to lớn open its main screen as shown in Figure A.

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Figure A: Main Screen

Step 2: Browse to select the RAR tệp tin showing the archive sầu is either in an unknown format or damaged error.

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Step 3: Press on the "Repair" button as shown in Figure B.


Figure B: Select the Damaged RAR Archive

Step 4: Select the location khổng lồ save sầu the fixed RAR archive sầu and cliông xã on the "Save" option as shown in Figure C.