FileInfo.com


.PEM File Extension


File Type Privacy Enhanced Mail Certificate
File Format File
Common? No
File Description Base64-encoded certificate file, such as a PEM-encoded X509 certificate; used to authenticate a secure website; typically imported from a Unix-based Apache Web server and compatible with OpenSSL applications.

PEM certificate files are generated automatically and are not meant to be opened or edited manually; some secure websites may ask users to upload a PEM file (possibly sent in an e-mail) in order to authenticate their identity.
Program(s) that open pem files Mac: Web server with OpenSSL installed
Windows: Microsoft Internet Information Server (IIS)
Unix: Web server with OpenSSL installed

Information from FileInfo.com - The File Extensions Resource.
http://www.fileinfo.com/extension/pem