Portable Document Format has been using worldwide because of its portability, reduced size, quick sharing, and less prone to corruption features. However, Portable Document Format offers lot of outstanding features but still it is not away from damage. Most of the time you get an error message while opening PDF or may not able to see any of the image, hyperlink, or object embedded in it. Have you ever thought that why you are not able to see the content of Portable Document Format file or get error message like one of the following:

• File is corrupt or damaged
• There was an error opening this document. The root object is missing or invalid
• PDF file is hanging while printing
• Adobe Reader is unable to read the file
• There was an error processing a page. Invalid Function resource
• There was an error opening this document. The root object is missing or invalid
• There was an error opening this document. There was a problem reading this document (14)
• PDF gets opened but there is no content available

Aforementioned are the errors and symptoms that help you recognize corruption in PDF leading you to fix PDF. Now, when you know that PDF has damaged, you must like to know how PDF can be corrupt because last time when you have opened it or uploaded to Web site it was quite fine. Mentioned below are the reasons for the damage of PDF file:

• PDF file has been damaged due to loss of Internet connection during uploading
• PDF file has been damaged due to loss of Internet connection during downloading
• It may also happen that computer gets shut down while the process of uploading or downloading PDF is in progress leading you to fix PDF
• Virus contamination on PDF stored in your computer’s hard disk, PEN drive, or any other storage media
• Human errors like improper handling of PDF

These are the top reasons behind the damage of PDF file. Due to any of these reasons PDF gets broken i.e. its header gets broken due to which Adobe Reader cannot recognize it as a valid file and displays an error message indicating corruption in the file. Sometimes, it happen that Adobe Reader gets success to open the file but cannot display the images, hyperlinks, callouts, and other such objects; you can view the textual information but other type of information is missing.

When a PDF file has damaged and you have lost all information stored in the file, you need to repair PDF file to regain the data stored in it. A user can fix PDF using Kernel for PDF repair tool, which has been specially designed to help you resolve PDF corruption and get lost data back with full accuracy. Using a Fix PDF tool, “n” number of PDF files can be repaired instantly in one cycle i.e. there is no need to waste time in repairing corrupt PDF one by one. Just select the corrupt PDF and click the repair button and all of the selected PDF files will be repaired automatically in few moments.