Home : File Types : CER File

.CER File Extension

File TypeInternet Security Certificate

3.5 (28 Votes)
CategoryWeb Files

What is a CER file?

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.

More Information

CER files can be viewed by clicking the lock icon near the edge of a browser window when accessing a secure site (secure sites use SSL encryption as seen by the "https://" prefix in the URL).

Secure certificate information can be viewed in Internet Explorer and Firefox by double-clicking the lock icon located near the bottom-right corner of the browser window. To view the certificate in Safari, click the lock icon located near the top-right corner of the browser window.

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Programs that open CER files
Updated 12/21/2018

About CER Files

Our goal is to help you understand what a file with a *.cer suffix is and how to open it.

The Internet Security Certificate file type, file format description, and Mac, Windows, and Linux programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and only publish information about file formats that we have tested and validated.

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