How to open DER files
Did your computer fail to open a DER file? We explain what DER files are and recommend software that we know can open or convert your files.
What is a DER file?
The DER file extension indicates to your device which app can open the file. However, different programs may use the DER file type for different types of data.
We are aware of 1 different use of the DER extension, which you can read more about below.
DER encoded X509 Certificate
Through our analysis of DER files, we know that one use of the format is DER encoded X509 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.
Software that will open, convert or fix DER files
These apps are known to open certain types of DER files. Since many different programs may use DER files for different purposes, you may need to try a few of the apps to open your specific DER file.