.CER File Extension
- Category: Web Files
- Format: Binary
What are .CER files and how to open them?
Can't open .CER file? Are you wondering what it contains? On our site we will explain to you what this file is, what it is used for and what software opens the .CER file.
What is a .CER file extension?
.CER file extension has been classified as Web Files. The format of .CER file is Binary
.CER is 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.
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.
List of all softwares that can open the Internet Security Certificate
| Windows | | Microsoft Internet Explorer | | Mozilla Firefox | | Adobe Acrobat Reader DC | | Adobe Acrobat DC | |
| Mac | | Apple Safari | | Mozilla Firefox | | Adobe Acrobat Reader DC | | Adobe Acrobat DC | | Apple Keychain Access | |
| Linux | | Mozilla Firefox | | Adobe Acrobat Reader DC | |