How to open CEF files

Did your computer fail to open a CEF file? We explain what CEF files are and recommend software that we know can open or convert your files.

What is a CEF file?

CEF files are Cereal Encrypted File files, which you can read more about below.

The CEF 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 CEF opener may not be able to open all kinds of CEF files. In this case, though, we only know of one specific use.

Cereal Encrypted File

Through our analysis of CEF files, we know that one use of the format is Cereal Encrypted File. 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.

We have not verified any programs yet that works with this specific format. If you know any, please use the 'Suggest a program' link below. Thanks!

CEF file openers, viewers, etc.

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

We have not verified any programs that we know for certain can work with CEF-files on Mac. If you know one, please use the Suggest link below and tell us about it!
We have not verified any online services that we know for certain can work with CEF-files. If you know one, please use the Suggest link below and tell us about it!