1. PDF File Extension
2. What is a(n) PDF file?
3. How to open PDF file?

3.1 Download and install application that supports PDF files
1. 3.1.1 Programs that support PDF files
3.2 Verify whether PDF files are associated with appropriate software
3.3 Check PDF file for other errors

4. Similar file extensions

PDF File Extension

File type Portable Document Format
File developer Adobe Systems
File category Layout Files
File popularity rating

What is a(n) PDF file?

Files with the .PDF extension allow you to open documents on different computers, regardless of the software or operating system. Thanks to them, you can avoid problems with formatting differences, fonts, shifted graphics, etc. They are often used in professional printing.

How to open PDF file?

If given user account does not have necessary permissions to open files with PDF extension, it is highly probable that no program that supports given files is installed on the users’ system. Below is a list of actions user should pursue in order to resolve most common problems.

Step 1. Download and install application that supports PDF files

After the application has been installed, the system should automatically open PDF files with given application. Below is the list of relevant programs along with operating systems they are available for:

Programs that support PDF files

Windows

MAC OS

Linux

Android

iOS

Windows Phone

Adobe Reader

Step 2. Verify whether PDF files are associated with appropriate software

It is possible that an application that supports PDF files is not associated with such files. In such case, the program should by manually associated with PDF files (right-click on the file icon → Properties → General Tab → In submenu "Open with" and click on "Change" button. System will display a list of suggested programs that support PDF files. Choose the application by checking the box "Always use the selected application to open this kind of files". System will store this information in its registry and use it to open PDF files with the selected program.

Changing PDF file association in registry

File association for PDF files can be edited manually by editing appropriate entry in Windows System Registry. However, it is discouraged as it may introduce errors to registry if not done properly and may even damage the system.

Step 3. Check PDF file for other errors

PDF file was not copied properly from storage medium.
Antivirus application prevents opening PDF files. In that case it is recommended to exercise extreme caution and recover or delete infected PDF file. It is also advised to scan the entire system for malicious software and viruses with antivirus software.
For PDF files downloaded from the internet it is advised to check if the file has been downloaded completely and is not corrupted. If not, the file should be re-downloaded.

Similar file extensions

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