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Any file type can get corrupted. If you don’t back up your data These Guys Didn't Back Up Their Files, Now Look What Happened These Guys Didn't Back Up Their Files, Now Look What Happened If there is anything I learned during those early years of working with computers (and the people that use them), it was how critical it is to not only save important stuff, but also to... Read More , finding out something broke can be a nightmare. Here, we’re looking specifically at PDF recovery.

It may be possible to fully repair the entire PDF, restoring it to its original state, or you might only be able to extract elements and rebuild the rest. Anything you can get, right?

Once you’ve checked out our tips, please pop into the comment section at the bottom to let us know if you’ve ever suffered PDF corruption and if you managed to resolve it.

Your PDF Reader

Are you sure that the problem is with the PDF file? Instead, it might just be that the program you’re using to view the PDF is playing up.

Repairing Adobe Reader

The most common PDF viewer is Adobe Reader. First, check the program is up to date by launching it and going to Help > Check for Updates…. You’ll either be told the program is up to date or that there are updates to install. If there are, go ahead and install them.

repair adobe reader

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If that doesn’t bring any luck, keep Adobe Reader open and this time navigate to Help > Repair Adobe Reader Installation. It might be that the files Adobe Reader relies on to run have become corrupted and this method will try to patch them up.

Still no luck? Search uninstall a program on your system search, select the relevant option and then uninstall Adobe Reader. Then head to the Adobe Reader website to download and install the latest version. At this point your copy of Adobe Reader should be good to go.

Using an Alternative Reader

Adobe Reader should now be spick and span, but it might be that your PDF file just doesn’t want to play ball with it. In this case, it’s worth trying out another tool.

In the past we’ve rounded up alternative PDF readers 4 Very Light Alternatives to Adobe Reader 4 Very Light Alternatives to Adobe Reader Are you still using Adobe Reader for PDF documents? It's time to move on to an alternative PDF reader that is lightweight, launches quickly, and yet keeps your documents save. Read More that are more focused on the reading of a PDF rather than anything extraneous. Two of the best choices, and both free, are Foxit Reader and Sumatra PDF. Download these and give them a shot with your PDF.

foxit

You might also find that Okular and Evince are able to read your PDF file when other software cannot. This is because they use a different rendering method to display PDFs. Thanks to user Mechanical snail at Super User for sharing that tip.

If you’re still having problems then it’s time to start focussing on repairing the PDF file itself or at least scraping it for what you can pull out.

Repair or Recover a PDF File

We’ve previously written about corruption with Office files Access & Recover Corrupt Office Files with These Tips Access & Recover Corrupt Office Files with These Tips Your important document is corrupted and you don't have a backup? Not all is lost! You can try to repair the file or find a backup you didn't know you had. Read More , but some of those techniques can also apply to PDFs, namely looking for previous versions of the file and using third-party applications.

Previous Versions

If you make use of Windows Backup 6 Safest Ways to Backup & Restore Your Files in Windows 7 & 8 6 Safest Ways to Backup & Restore Your Files in Windows 7 & 8 By now, we're sure you've read the advice over and over: Everyone needs to back up their files. But deciding to back up your files is only part of the process. There are so many... Read More or have another backup program then you may find that you can roll back to a previous and working version of the PDF. To check with Windows Backup, right click the PDF in Windows Explorer, select Properties and then the Previous Versions tab.

windows-recovery-restore-previous-versions

This will bring up a list of all the old versions of the file that exist. You can Open the copies to check them out and then use the Restore… button to bring them back to life on your system.

A similar technique would be to use a data recovery What Is Data Recovery And How Does It Work? What Is Data Recovery And How Does It Work? If you've ever experienced a major loss of data, you've probably wondered about data recovery -- how does it work? Read More program, like Recuva, that will scan your drive and look for old files that have been deleted from your system. If you had an old copy of the PDF file that you’ve removed, this technique may bring luck.

Repair Applications

There are applications out there that specifically aim to repair your PDF. Some of these don’t require you to download any software and can be run in the browser, like PDFaid and PDF Tools Online. Give these both a shot, but if the corruption is severe then they may not be able to help.

pdf tools online

You can also try specialist file repair programs, like FileRepair1 (our FileRepair1 review FileRepair1: Repair Damaged Or Corrupted Files FileRepair1: Repair Damaged Or Corrupted Files Read More ). This will scan the PDF, identify the failure and fix what it can. It’s not always successful in every case, but you may find it helpful.

Extracting From the PDF

If you’re not able to repair the entire PDF, then you may still be able to extract elements like the text and images.

For the text, you can use programs that will convert your PDF to a Word file and allow you to get the text that way. However, I find one of the best tools is actually the online application PDF to Word Converter offered by Nitro; although some characters may look a bit funky depending on the type of corruption.

How to Repair or Recover Data from a Corrupted PDF File pdf image converter02c

If your PDF contains images, try following our guide on how to extract images from a PDF How to Extract Images From PDF Files & Save Them for Other Uses [Windows] How to Extract Images From PDF Files & Save Them for Other Uses [Windows] We had taken an earlier look at 6 Ways To Convert A PDF To A JPG Image. But over here, I am looking for something specific – extracting images only from PDF files. The solutions... Read More . Again, this may have varying results depending on the level of corruption, but it’s definitely worth seeing what can be pulled out.

Save Your PDF

Hopefully these methods have been useful in saving your PDF. You might not have been able to recover everything (such is the bane of corruption), but you may have saved elements of the file.

Remember, you should always have a stable backup plan The PC Backup & Restore Guide The PC Backup & Restore Guide Disasters happen. Unless you're okay with losing all of your data, you need a good backup system. Read More in place to ensure that corrupted data doesn’t bother you because you’ll always have a secondary copy to restore from.

Have you ever suffered from a corrupted PDF? How did you go about repairing it?

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  1. Samir
    December 28, 2016 at 10:37 pm

    We scan thousands of documents each year as a part of going paperless for all our records. Very regularly, our scanner will have a 'sending error' when sending the pdf file to the file server. So then it's corrupted and can't be read by any type of reader.

    I've tried all the free online repair sites, and pdftools linked in the article is hands-down the best. We haven't tried installing any others, but we will once we have to recover those that pdf tools couldn't recover and we no longer have the original to.

  2. sandra diaz
    July 26, 2016 at 6:35 am

    Hi Joe,
    Thank you for providing us such an informative article. So I would like to tell you about the PDF Recovery Tool of SysTools which I have used personally and is able to repair corrupt PDF file data and create new portable document without any changes in original formatting.
    It also Saves corrupt PDF file in new location as healthy document. I am recommending it as a User not as a promotional activity. You can download a demo versions of the software for pretesting the software.

  3. Alex Butler
    September 7, 2015 at 7:26 am

    You can also use Kernel for PDF repair tool to repair your corrupted or damaged PDF file easily.