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How to open CER files on your device

If an error occurs when you try to open CER file on your device, you should do two things – install appropriate software and associate CER files with this software. If this does not solve the problem, then the cause may be different – you will find more details in this article.

  1. 1. CER File Extension
  2. 2. What is a(n) CER file?
  3. 3. How to open CER file?
    1. 3.1 Install a program that supports CER files
      1. 3.1.1 Programs that can open CER files
    2. 3.2 Associate given software with CER files
    3. 3.3 Check whether no other errors related to CER files occur
  4. 4. Similar file extensions

CER File Extension

File
  • File type Internet Security Certificate
  • File developer N/A
  • File category Web Files
  • File popularity rating
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What is a(n) CER file?

CER files are used to certify security for a website. They are generated by certification authorities and saved on the website's server. They testify to its SSL encryption, authenticity and lack of virus threats. You can view them by clicking the padlock icon next to the website URL.

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How to open CER file?

There can be various causes of problems that can arise when opening opening .CER files. Each problem requires a different approach, but most can be solved by following he instructions below.

Step 1. Install a program that supports CER files

In order to open CER file an appropriate program that supports this file format must be installed on the system. Below is the list of programs that support files with CER extension.

Programs that can open CER files

Windows programs
Windows
MAC OS programs
MAC OS
Linux programs
Linux

Download installer for given application and launch it. After the installation has been completed, CER files should be opened with installed application by default next time you try to open this type of file.

Remember!

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Not all listed applications will be capable of performing all operations on CER files. Some applications may only be capable of opening such file and viewing its contents while the purpose of others may be converting files to other file formats. Therefore you should check beforehand the capabilities of applications in relation to CER files.

Step 2. Associate given software with CER files

A situation can arise where user has an appropriate application supporting CER files installed on their system, but such application is not associated with this type of files. In order to associate given application with CER files user should open a file submenu by right-clicking the file icon and selecting "Open with" option. System will display a list of suggested programs that can be used to open CER files. Select appropriate option and check "Always use selected application to open this kind of files". System will save this information from now on use selected program to open CER files.

When the above-mentioned solutions fail, other options must be pursued. It is possible that the CER file in question is corrupted or damage. The most common causes of file damage are:

  1. File with CER extension is incomplete (for example, file has not been downloaded completely from the internet or not copied properly from source)
  2. File data is corrupted
  3. Damaged or corrupted storage medium on which the CER file is stored
  4. File icon does not represent the original file but is only a shortcut to the location where the CER file was saved and then deleted
  5. User account is not privileged to perform operations on CER files. In that case it is advised to contact the system administrator or an IT expert

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