1. PDF_ File Extension
2. How to open PDF_ file?

2.1 Download and install application that supports PDF_ files
1. 2.1.1 Programs that support PDF_ files
2.2 Verify whether PDF_ files are associated with appropriate software
2.3 Check PDF_ file for other errors

3. Similar file extensions

PDF_ File Extension

File type Adobe Acrobat Portable Document
File developer Adobe Systems Incorporated
File category Misc Files
File popularity rating

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

Adobe Acrobat

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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