Add file extension

File extension P7C

The most common cause of problems with opening the P7C file is simply the lack of appropriate applications installed on your computer. In this case, it is sufficient to find, download and install an application that supports the P7C file format - this type of programs are available below.

File type PKCS #7 Certificates Format
Developer N/A



It should be noted that some coded data from files that your computer does not read can be sometimes previewed in a Notepad. This way, we will read passages of a text or numbers. It is worth checking if this method can also be applied to the P7C files.

What should be done when an application from the list has already been installed?

Often, an installed application should automatically link to a P7C file. If it did not happen, the P7C file can be linked with the newly installed application manually. Simply right-click on the P7C file, then from the available list select "Choose default program". Next, select "Browse" and find the application you selected. These changes have to be confirmed by pressing the "OK" button.

Programs that can open the P7C file

  • Microsoft Certificate ManagerMicrosoft Certificate Manager
  • Adobe ReaderAdobe Reader
  • Adobe AcrobatAdobe Acrobat
  • Microsoft WindowsMicrosoft Windows
Mac OS
  • Apple Keychain AccessApple Keychain Access
  • Adobe ReaderAdobe Reader
  • Mac OS XMac OS X

Why can’t I open the P7C file?

However, problems with the P7C files can also have a different background. Sometimes even the software, installed on your computer, that supports the P7C files does not solve the problem. The reason for the fact that the P7C file can’t be opened and used can also be:

- an incorrect link to the P7C file in the registry entries
- corruption of a P7C file, that you want to open
- infection of a P7C file (viruses)
- insufficient computer hardware resources
- drivers out of date
- accidental deletion of the P7C file from the Windows registry
- incomplete installation of the program that supports a P7C file?

Solving these problems should allow the free opening and working with the P7C files. If the computer still has problems with the files, use the services of an expert who will diagnose a specific cause.

My computer does not show file extensions, what should I do?

In the standard Windows settings, a computer user cannot see the P7C file extension. However, you can successfully change this in the settings. Just go to "Control Panel" and select "Appearance and Personalization". Then, go to the "Folder Options" and open the "View" tab. On the "View" tab, you will find "Hide extensions for known file types" – you should mark this option and confirm by pressing "OK". At this point, the extension of all files, including the P7C files should be displayed after the file name.