DataNumen RAR Repair

Why a WinRAR archive file will get corrupt?

There are many reasons that will corrupt a RAR file, such as viruses, network issues when downloading a file, hard drive failure, unplugging the external USB drive during data transfer, etc. We recommend you to have our RAR repair tool on hand. So, whenever you encounter a corrupt RAR archive, you can use our tool to recover data back as soon as possible.

Are there any free ways to repair corrupt RAR files?

Yes, you can try to use some popular apps such as WinRAR or 7-Zip to repair corrupt RAR files, as below:

1. Use WinRAR to repair corrupt RAR files

WinRAR is a trialware. During the evaluation period, you can use all functions in it. To fix RAR files with WinRAR:

1. Start WinRAR.
2. Select the corrupt RAR archive to be repaired.
3. Click Tools > Repair archive.
4. In the pop-up dialog box, select the folder to put the repaired archive and choose Treat the corrupt archive as RAR.
5. Click OK, WinRAR will repair the corrupt file.

2. Use 7-zip to repair corrupt RAR files

7-Zip is freeware. You can use all functions without any limitations. To fix WinRAR archives with 7-Zip:

1. Start 7-Zip.
2. Click File > Open to open the corrupt RAR file.
3. If 7-Zip can open the file, then it has ignored the corruption in the RAR file and extracted data inside it properly. You can extract items inside it as needed.

If WinRAR and 7-Zip fail to repair the corrupt file, then the file is badly damaged. You can use our RAR repair tool to fix the file.

Which versions of Windows are supported?

Currently, our tool supports Windows XP, Windows Vista, Windows 7, Windows 8, Windows 8.1, Windows 10, Windows Server 2003, Windows Server 2008, Windows Server 2012, Windows Server 2016, and Windows Server 2019 operating systems. It also supports both 32bit and 64bit systems.

Do you support Windows 11?

We have completed tests on Windows 11. Our recovery software is 100% compatible with Windows 11. However, we have not published this information on our website and help document yet.

Which formats of RAR files are supported?

Currently, our RAR file repair tool supports to repair damaged RAR files in format version 1.3 to 2.9. It does not support to repair RAR archives in format version 5.0+, which are created by WinRAR 5.0+.

What is a CRC error? Can your tool fix such errors?

Cyclic redundancy check (CRC) is an algorithm that can be used to detect changes in data. In a RAR archive, when a file item is archived into it, other than the compressed file data, the CRC value of the uncompressed file data is also calculated and stored together. Thus when the file item is extracted, the extraction app should also calculate the CRC value of the uncompressed data and compare it with the stored one. If they are the same, then the file data should be intact. However, if they are different, then this is called a CRC error, which means the file data has been changed. So, we use the CRC value to check whether the file data in the archive are corrupt or not.

CRC value is very strict. So even if one byte of the file data is changed, the CRC value will be inconsistent with the original one. In such a case, WinRAR and other RAR apps will refuse to extract files, which is called an extraction error. But actually, most of the bytes are still OK. Our tool can use advanced algorithms to recover data from the archive, so to reduce data losses.

Also sometimes, the file data are intact, but the CRC value itself is corrupt. In such a case, when other RAR apps refuse to extract files, our tool can also help you to fix the file corruption and get data back.

How long will it take to repair a RAR file?

The time of the repair process depends on many factors, including:

1. The WinRAR file size.
2. Count of items in the RAR file.
3. The compression algorithm for the items.

What is an SFX archive? Can you repair SFX archives?

SFX means self-extracting file. It is an EXE file. It contains both the extractor and the compressed data. So when you execute it, it will extract the compressed data for you.

Our tool supports to repair SFX archives. You can just select the SFX archive as the source file to be repaired, then click the Start Repair button to start the repair process in the same way as the WinRAR archive.

Can you repair corrupt Zip files?

DataNumen RAR Repair does not support to do so. You can use DataNumen Zip Repair to repair your corrupt Zip files.

What is the difference between the demo version and the full version?

The demo version and the full version use the same recovery engine. However, the demo version will only show a list of the recoverable items in the archive, but will not output them.

Which kinds of RAR errors can you fix?

Our tool can fix many RAR errors, including compression error, decompression error, extraction error, CRC error, file extension error, file download error, file transmission error, file header corruption, etc.

Can your tool repair RAR files on Mac systems?

Currently, our RAR repair software cannot run on the Mac system. But you can use the following way to repair WinRAR files on Mac:

1. Copy the RAR file from the Mac system to a PC/Windows system.
2. Install our tool on the PC/Windows system.
3. Repair the RAR file with our tool.
4. Copy the fixed RAR file back to the Mac system.

What are the advantages of your tool over other competitors?

There are many similar RAR repair tools in the market, such as Remo Repair RAR, Recovery Toolbox for RAR, etc. We have performed comprehensive tests on all these products and our RAR repair software has the best recovery rate.

 

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