.CER File Extension

.CER File Extension

File Type

Internet Security Certificate

Developer N/A
Popularity
3.5  |  47 Votes
Category Web Files
Format Binary

What is a CER file?

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

More Information

You can view a website's certificate in a web browser by clicking the lock icon when accessing a secure site (secure sites use SSL encryption as seen by the https:// prefix in the URL). In each of the major web browsers, such as Google Chrome, Microsoft Edge, and Mozilla Firefox, the lock icon is located on the left side of the address bar.

Open over 400 file formats with File Viewer Plus.Free Download

Programs that open or reference CER files

Updated December 21, 2018

Verified by FileInfo.com

The FileInfo.com team has independently researched the Internet Security Certificate file format and Mac, Windows, and Linux apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

If you would like to suggest any additions or updates to this page, please let us know.