CER File Type

- The quick facts

What are CER files and how to open them

Are you having problems opening a CER file or just wondering what they contain? We explain what these files are used for and show you software that we know can open or otherwise handle your files.

What is a CER file?

A .CER file is an Internet Security Certificate file. Through our analysis of CER files, we know that one use of the format is Internet Security Certificate. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

How to open CER files

Important: Different programs may use files with the CER file extension for different purposes, so unless you are sure which format your CER file is, you may need to try a few different programs.

While we have not verified the apps ourselves yet, our users have suggested 8 different CER openers which you will find listed below.

Last updated: July 13, 2020

Other file formats using extension .CER

While Internet Security Certificate is a popular type of CER-file, we know of 2 different uses of the .CER extension. Different software may use files with the same extension for different types of data.

MSI/Accelrys Cerius II

Through our analysis of CER files, we know that one use of the format is MSI/Accelrys Cerius II. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

While we have not verified the apps ourselves yet, our users have suggested 8 different CER openers which you will find listed below.

Various apps that use files with this extension

These apps are known to open certain types of CER files. Remember, different programs may use CER files for different purposes, so you may need to try out a few of them to be able to open your specific file.

The Print ShopThe Print ShopUser submitted
PrintMasterPrintMasterUser submitted
ScrapbooksScrapbooksUser submitted
PrintMaster GoldPrintMaster GoldUser submitted
Print ArtistPrint ArtistUser submitted
DigitalSign Professional ApplicationDigitalSign Professional ApplicationUser submitted
DigitalSign Reader ApplicationDigitalSign Reader ApplicationUser submitted
Expert Stationery ShopExpert Stationery ShopUser submitted
We have not verified any software that we know for certain will work with CER-files on Mac. If you know one, please use the 'Suggest a program' link below and tell us about it!
We have not verified any web services that we know for certain will work with CER-files. If you know one, please use the 'Suggest a program' link below and tell us about it!