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    PDF Won't Open? Here's how to fix it online! -

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    Aina Prat
    @ainaprat

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    Sometimes PDF files can get corrupted while sending, transferring between different computers or systems, or as a result of deletion and recovery from the computer hard drive. Or a PDF document may be damaged already at the time of creation.

    Regardless of the causes that gave rise to the problem, the fact remains that the PDF does not open. What to do when it turns out cannot open a PDF file and do you absolutely need to access the content of that document? Below we have collected a number of sites and applications that are simple to use, and even free. With these tools you will have a good chance of repair or recover the PDF that does not open and be able to access it again!



    • Part 1: Common causes of PDF corruption
    • Part 2: Online services to repair damaged PDF
    • Part 3: Recover PDF on Windows

    1. Common causes of PDF corruption

    PDF (Portable Document Format) is probably the most popular document format because it is supported by all operating systems, and it is more secure. PDF documents are difficult to change, and they also can be protected with a password and watermarks.

    However, PDF files sometimes become corrupted, and when you try to open such an Adobe Acrobat/Adobe Reader document, you might encounter various error messages, such as the following:

    1. PDF File not readable with your software
    2. Root object is invalid or missing
    3. File is damaged or corrupt
    4. There was an error opening this document
    5. There was an error processing this page
    6. It contains info not understood by the viewer
    7. Format error – Not a PDF File or Corrupted

    Most often, such errors can be attributed to software malfunction ( browsers, mail programs, operating systemantivirus software or firewall).



    2. Online services to repair damaged PDF

    a) PDF2GO

    Website: https://www.pdf2go.com/repair-pdf

    Using this online PDF repair service it's very simple. All you have to do is upload your PDF file (cloud storage is also supported) and start the analysis and subsequent repair. At the end of the process you will be able to download the repaired PDF document.

    On PDF2Go it is also possible to convert and edit PDF files. Therefore, if you need to repair another type of document you can first convert it to PDF and then perform the correction. The file you get will always be a PDF document.

    How to repair PDF files online? First, upload your PDF file. Then to start the repair click IT BEGINS.

    b) PDFaid

    Website: http://www.pdfaid.com/repair-pdf-file.aspx

    Repair PDF is a free PDF “doctor”. If you have an important PDF but when you open it in Adobe PDF it appears that it is damaged, then there is a high chance that you can repair it with such a tool.

    This website of PDF repair looks for all possible reasons and solves them all. A corrupt PDF file will be fixed and you will be able to view it in any PDF reader. There are rare cases in which a PDF file is irreparably corrupted.

    Damaged PDF files are not useful if they cannot be repaired. This PDF repair software repairs corrupt PDF documents and makes them useful again. To use this application all you need is a browser. You don't need to install any software.


    From the home of the site upload the PDF. At the bottom change (if you want) the PDF settings and finally start the repair of the document


    c) iLovePDF

    Website: https://www.ilovepdf.com/repair-pdf


    Upload a corrupt PDF and start the repair. Depending on how damaged the PDF is, this web-based tool can recover it partially or completely.

    d) Sejda

    Website: https://www.sejda.com/repair-pdf

    Unlike other online repair services, Sejda guarantees privacy because it automatically deletes uploaded files after 5 hours. This is also a free service for documents up to 200 pages or 50 Mb and 3 activities per hour.

    The operation is trivial:

    • Select and upload PDF files
    • Click on Upload PDF file
    • Repair PDF by clicking the Restore PDF button and wait for the task to complete.


    3. Recover PDF on Windows

    If you have accidentally deleted a PDF document and are looking to recover / repair it then we recommend that you give it a try Data Recovery. With this software ptorai recover deleted or damaged PDF files in minutes.

    After starting Data Recovery you will see the initial interface with the various types of files that you can search for and recover. Among these select "DOCUMENTS".

    At the bottom select the disk you want to recover from (e.g. hard drive C: or an external drive).

    Click the button SCAN to start the quick scan on the selected disk. All files will be displayed in the left sidebar. If the quick scan can't get the result you want, you can click DEEP SCAN (deep scan) to try again.

    From the scan result you will be able to see the recovered files and understand if there is also the PDF file you need. You will be able to preview the relevant information of each file, including file name, size, creation and modification date. Alternatively, you can use the function Filter to quickly locate the files you want to restore.

    Click on the desired items and then click on the RECOVER button to restore the selected files to your computer.

    That's it!

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