“While trying to mở cửa a PDF tệp tin in Acrobat Reader, it is showing me with the error stating ‘Format Error: not a PDF or corrupted.’ I am not certain why it is happening all of a sudden, but I am quite afraid of losing my precious file. Someone please help me with this and suggest me a way khổng lồ get my file back healthy và without error.”

Sometimes in adobe due lớn missing updates errors like “document could not be saved adobe reader error 110” can happen. So keep trying to have updates regularly.

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In the above mentioned query, the user is facing a PDF file error. As we know that PDF is the main source of document transfer in organisations these days, it holds a certain importance. Hence, it becomes very important khổng lồ fix any type of error showing up and also khổng lồ save the file from any type of loss.

Reasons of facing “Format Error: not a PDF or corrupted

There can be many reasons why you are facing the “Format Error: not a PDF or corrupted.” By reading the message, it can be understood that either the PDF tệp tin is not genuine or is corrupted or damaged by any means.

Damaged or broken PDF file due khổng lồ incomplete download or transfer.Damaged Adobe Reader.Outdated version of Adobe PDF Reader.Virus attack.Network or browser issuesAbrupt application/system shutdownImproper system, file, or program handling practices by user.Corruption in the PDF file.

All of the above-mentioned reasons can lead to this error, & most of them are quite avoidable. But, corruption is the worst và the most dangerous of all and can be a serious threat khổng lồ your file.

As primary solutions, you can kiểm tra the internet connection, browser compatibility, perform system reboot và antivirus scan as trials khổng lồ fix the issue.


Read Also: A Simple Way lớn Repair Adobe PDF Files
Fixes for “Format Error: not a PDF or corrupted”

As we promised, we are going to menu the most reliable và secure ways to fix this error. There are not many trusted ways with which you can fix this error, hence we are going khổng lồ mention some tricks & solutions.

Get the tệp tin again

If you received the PDF tệp tin which is showing the error, in an email, then there are chances that something went wrong while decoding it. So, it is suggested that you delete that file permanently from your system and tải về it again. Similarly, if you have downloaded or transferred that PDF file from any other source, then there are chances that the process was incomplete that left the tệp tin broken. So, in that case too, it is suggested that you delete the tệp tin permanently and download it again.

Repair Adobe Reader

This error may also indicate that the program you are using to open the PDF file, i.e., Adobe Reader is damaged. So, in this case, it is recommended lớn fix the Adobe reader first và then try to open the tệp tin again. Khổng lồ repair the program, follow the steps mentioned below:

In Windows, click on the Start button & look for the Control Panel and open it.
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There, click on the Programs and Features.
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In the Uninstall or change a program section, go khổng lồ the Adobe Acrobat Reader và make a right click. Now select Change as the option lớn move forward.
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Finally, click on the Repair Program Installation option khổng lồ fix it.
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Once the repair process is done, restart the system và try to mở cửa the tệp tin again.

This may surely fix the issue if it was arising due khổng lồ the damaged Adobe Reader.

Xem thêm: Những Nhà Thờ Đẹp Nhất Thế Giới, Top 10 Nhà Thờ Đẹp Nhất Thế Giới

Reinstall Adobe Acrobat Reader Again

It may also happen that the version of the Adobe Reader is outdated. In this case, it is suggested khổng lồ uninstall the program và install the latest version of it. To vày this, follow the below-mentioned steps:

Start with opening the Control Panel on your system.
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Now, click on the Programs và Features option.
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In the Uninstall or change a program section look for the Adobe Acrobat Reader, make a right click & select Uninstall.
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Once the uninstalling process is done, restart the system.Once the system is started again, install the latest version of Adobe Acrobat Reader. You can tải về it from the Adobe website.

Once you have performed all of the steps properly, try opening the file again và see if you still encounter the error.

Fix the error with professional tool

Your answer lớn restore entire corrupt PDF file is PDF file repair software, the final way to fix this error is by repairing the PDF file with Kernel for PDF Repair. Doing so will fix the error. This tool is so powerful that it has no limitation of file number and size and also fixes the severe types of corruption in the file. In just a few simple steps, your corrupt PDF file(s) will be fixed và you will end up with a healthy and working piece of PDF file. This tool does not interfere with the quality of the PDF file and also recovers it with all its objects. If you still have your doubts, you can repair and xuất hiện the PDF tệp tin for không tính phí with the trial version of the tool. To save the repaired file, you need lớn purchase the tool from the website.


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Let us go through the tool’s process once to lớn get a fair idea of the tool. Before proceeding with the tool’s demonstration, we would like to suggest you download the tool from the website. Make sure you install it properly & then run it on your system khổng lồ proceed with the below-mentioned steps.

Start with clicking on the Select File(s) option and add a single or multiple PDF files.
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Once the files are added, click on the Repair button lớn proceed with the repairing process. You can remove unwanted files by selecting files & clicking on the Remove File(s) option.
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Now, the tool will start repairing files and you get the live updates of it on your screen. Once the process is over, you will have your healthy PDF file(s).
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To access the repaired PDF files folder, just click on the xanh highlighted liên kết and it will redirect you khổng lồ the thư mục containing the repaired files.

The three step process mentioned above is no shortcut, it is all you need to follow khổng lồ fix PDF file errors.

Conclusion:In this blog, we discussed “Format Error: not a PDF or corrupted” faced by users while opening a PDF file. We first tried to lớn know the reasons behind this error & got khổng lồ know that corruption is the major reason that leads to this error. So, after trying a few hacks và tricks, we used this tool to fix the corruption in the PDF file. We decided to lớn use this automated tool, as it is the most reliable & the quickest way to vày so. After using this tool the corruption was fixed và we were finally able to open the tệp tin without any error. Hope this blog helped you khổng lồ fix the error.