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.CER File Extension
TIP: Run a free scan for .CER file extension errors.
| File Type |
Internet Security Certificate |
| Popularity |
 Very Common |
| Category |
Web Files |
| File Description |
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. |
| Program(s) that open cer files |
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Mac OS |
 Apple Safari
Mozilla Firefox
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Windows |
Microsoft Internet Explorer
Mozilla Firefox
Other Web browser
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Linux |
Mozilla Firefox |
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| Updated 1/28/2010 |
 Fix file extension .CER errors. |
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