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How to open .CER file extension?

File Type : Internet Security Certificate File
Compatible with (WinXP,Vista,Win7,Win8 and Win10)

Looking for a program to open .CER files?

"Windows unable to open a file!" is probably the most common error faced by millions every day. This is either because the program required to open a file is not available on your system or there may be other issues.

We recommend that you run a free scan to check for missing drivers.



What is .CER file extension?

.CER file extension is a known file type. This section of tells you everything you need to know about this extension.
Security file provided by a third party Certificate Authority, such as VeriSign or Thwate, that verifies the authenticity of a website; 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.
You can see a list of software programs here on that can open this file type so that you don’t need to search for it on the web. You can then open your file with this extension using a software listed below.

Software that can be used to open .CER files:

Microsoft Windows:
  • Microsoft Internet Explorer
  • Mozilla Firefox
  • Other Web browser
  • Adobe Reader
  • Adobe Acrobat DC
  • Mozilla Firefox
  • Adobe Reader
Apple Mac OS X:
  • Apple Safari
  • Mozilla Firefox
  • Adobe Reader
  • Adobe Acrobat DC
  • Apple Keychain Access