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Almost every firm, professional, and individual relies on PDF files for storing and sharing their crucial and confidential data. But sometimes, while trying to open a PDF file, ‘The file is damaged and could not be repaired’, an error message pops up, which means that the PDF structure is damaged internally.
Users can even lose their crucial PDF data after the occurrence of this error and corruption/damage in PDF files. To resolve this problem, we’re going to assist with the possible causes of the error, along with manual and automated solutions. Let’s get started now!
Reasons For “The File is Damaged and Could Not be Repaired” Error
This PDF error mainly occurs if the structure of the PDF file is corrupted/damaged and the file is unreadable by Adobe Acrobat. Some of the other significant reasons are as follows:
- Improper handling of PDF files: : Human errors like forcefully terminating applications while the PDF file is involved in a write operation could result in corrupted data.
- Header corruption:When you try to open an old PDF file that has %PDF somewhere in the first 1000 characters of the PDF header, you will get the error.
- Virus/Malware attack on PDF files: Virus/malware infection makes the PDF inaccessible by damaging or encrypting the PDF file.
- Interruptions while download/transfer: Incomplete download/transfer of a PDF file misses some part of PDF data, structure, layout, etc., which causes severe problems in PDF files.
- Accessing PDF files in incompatible software: Incompatible/unreliable applications that cannot correctly read the PDF file header will throw errors.
- Generating PDF with the wrong tool: Sometimes, the software you used to create the PDF can make mistakes and corrupt the PDF objects.
These are a few common reasons for the error. Now, let’s go through the easy yet effective workarounds to resolve the file is damaged error.
Methods to Fix “The File is Damaged and Could Not Be Repaired” Error
Here are the effective stepwise resolutions that will help you fix ‘the file is damaged and could not be repaired’ error popping up with your PDF files.
Method 1. Download/Transfer the PDF files again
When you download or transfer a PDF file and the operation is interrupted due to a sudden power outage, abrupt system shutdown, or an internet issue, the PDF file loses crucial objects. This damages the file structure and makes the PDF file problematic.
So, if you are facing error messages like “The file is damaged and could not be repaired”, then re-download or re-transfer the PDF file. Then, open the PDF and see if the error is gone. However, if the error still exists, go to the next solution.
Method 2. Move your PDF files from the Network Shared folder
Generally, it is found that the user tries to open the PDF files stored in Network share folders. To access remote files, you need strong bandwidth because unstable internet will result in packet loss that leads to incomplete download and may lead to common PDF file errors.
To confirm if the issue is due to a Network shared folder, download that particular PDF file to your local system. Now open it. If you do not get any errors, investigate for an internet issue.
Method 3. Update Adobe Acrobat Reader
If your Adobe Acrobat Reader is outdated, it may fail to correctly scan the PDF file structure and lead to such errors while opening it. To fix this, you need to update this application with the steps below:
Step 1. Go to the Menu button in the Adobe Application, click the Help option, and tap on the Check for Updates option.
Step 2. If the update is available, download it immediately. After updating Adobe, try to open PDF files.
You can also repair the Adobe Acrobat installation in order to fix ‘The file is damaged and could not be repaired’ error effectively. For the same, follow the steps below:
Step 3. Again, go to the Menu button in the Adobe application, tap on Help, and choose Repair Installation.
Step 4. Press the Yes button in the confirmation window. . Follow the further procedures and complete the repair process.
Now, restart the system, try to open your PDF files, and check for the error.
Method 4. Change the Registry Settings
This method requires some technical expertise and works best if the issue is due to legacy PDF files that have characters before the %PDF string in the PDF header. Here, you need to change the setting preferences in HKCU that fixes ‘The file is damaged and could not be repaired’ error. Also, create the AV General key manually if it is not available in the HKCU window. For the same, follow the steps below:
Step 1. Configure the below path in HKEY_LOCAL_MACHINE:
HKLM\Software\Adobe\(product name)\(version)\AVGeneral\bValidateBytesBeforeHeader=dword:00000000
Note: You can enter the product name as: Adobe Acrobat and version as 11.0 in the above path.
Step 2. Disable the header validation with below HKEY_CURRENT_USER path:
HKCU\Software\Adobe\(product name)\(version)\AVGeneral\bValidateBytesBeforeHeader=dword:00000000
Note: Match the installation and change the product and version number in the preference path accordingly. After performing these steps, restart your system again and open the PDF file.
Method 5. Use another PDF reader
If the Adobe Acrobat Reader still fails to open your PDF file, switch to a different PDF reader. There are multiple other options available to download. However, the most basic and free PDF viewer that almost everyone has on their system is the internet browser.
- Open any modern internet browser, like Google Chrome, Mozilla Firefox, Edge, or Safari.
- Select the PDF file, drag it, and drop it directly on the browser to open.
Method 6. Restore PDF file version
If the PDF file was working fine before and it suddenly started throwing the file damaged error, then you can also try to restore the entire corrupt PDF file to a healthier version. For this:
- Right-click the PDF file with the issue.
- Select Properties and go to the Previous Versions tab.
- Choose a version from the list and click Restore.
Method 7. Convert the PDF to a Word File.
This is more like a workaround than a legitimate solution for the error “The file is damaged and could not be repaired’. Sometimes, PDF to Word file conversions help to fix error messages in PDF files. This method also helps you to edit or alter your PDF files according to the Microsoft Word environment. You can also save the existing contents in a PDF file directly from the Word tool.
Note: The original layout and structure of PDF contents may hamper. So, use this method at your own risk. Also, depending on the level of corruption, the conversion may fail.
Fix corrupted PDF files with a high-end solution
If none of the manual methods work and even the PDF to Word conversion fails, then your PDF file is severely corrupted, and you need a PDF repair tool . Kernel PDF Repair is one such tool that comes with advanced features and functionalities to fix corrupted PDF files of any size. Also, it recovers all PDF contents, including images, text, digital signatures, audio, tables, charts, etc., in the original layout and quality. This tool is quick and easy to use, even a non-tech user can recover and repair corrupted files easily.
Some of the other features of the tool are as follows:
- Repair multiple corrupted PDF files simultaneously.
- Recover password-protected PDF files effectively.
- Quick and simple tool to repair Adobe PDF files.
- Extract Layout and Content from PDF Files in original quality and layout .
- Supports all versions of PDF files, including PDF/A, PDF/X, PDF/VT, PDF/E, and PDF/H.
- Compatible with all Windows OS (Windows 11, 10, 8.1, 8, 7, Vista, XP, etc.) & servers.
Let’s learn how to repair corrupted files step by step:
Step 1. Download and install the Kernel PDF Repair tool on your system.
Step 2. Click Add Files(s), browse to the location where the corrupt PDF file is. 
Step 3. Select the PDF file, single or multiple, and click Open to add the PDF file(s) to the tool.
Step 4. Click the Repair button and specify where to save the PDF file after repairing.
Step 5.The tool starts the PDF repair process.
Summing Up
It is tedious to fix corrupted PDF files, but we’ve provided helpful and effective methods for resolution of ‘The file is damaged and could not be repaired’ error. However, it is possible that manual approaches may fail to give the desired output due to their limitations and severe corruption/damage in PDF files.
So, utilize the recommended automated PDF repair tool for an easy and guaranteed solution to fix corrupted PDF files. Take the free trial version now. Download it today and repair damaged or corrupted PDF files .
Frequently Asked Questions
A. In such a case, the problem lies with the PDF reader you are using. Try to open the same PDF file in an internet browser or in another PDF reader tool.
A. They will be preserved. However, the quality may be compromised depending on the tool you use. Make sure to use only a trusted and reliable tool that can accurately extract data from PDF and save it to a Word file.
