DER File Type- The quick facts
What are DER files and how to open them
Are you having problems opening a DER 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 DER file?
A .DER file is a DER encoded X509 Certificate file. 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.
How to open DER files
Important: Different programs may use files with the DER file extension for different purposes, so unless you are sure which format your DER file is, you may need to try a few different programs.
While we have not verified the apps ourselves yet, our users have suggested 2 different DER openers which you will find listed below.
Last updated: November 18, 2012
Suggest another file format using extension DER
While we know of one file format using the .DER file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .DER file.
Various apps that use files with this extension
These apps are known to open certain types of DER files. Remember, different programs may use DER files for different purposes, so you may need to try out a few of them to be able to open your specific file.