CER File - opening and understanding

Did your computer fail to open a CER file? We explain what they are used for and recommend software that we know can open or otherwise handle your .CER 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

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension CER for different purposes.

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

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.

The CER file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a CER opener may not be able to open all kinds of CER files. In this case, look through both formats to make sure you find the best suited CER viewer.

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 viewers for this file format

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!