FileInfo - The File Extensions Database

Search over 10,000 file extensions and software programs.

Today's File Type – October 19th

.CER

Internet Security Certificate

A CER file is a security file provided by a third party Certificate Authority, such as VeriSign or Thwate, that verifies the authenticity of a website. It is installed on a web server to establish the validity of a certain website hosted on the server.   View more »


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