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.CRT File Extension

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File TypeSecurity Certificate

DeveloperN/A
Popularity
4.4 (20 Votes) Thanks for voting!
Rare Uncommon Average Common Very Common
CategoryWeb Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

Definition

Certificate used by secure websites (beginning with "https://") to verify their authenticity; distributed by companies such as Verisign and Thawte.

More Information

Certificate files are automatically recognized by Web browsers when a user visits a secure site. The information stored in the certificate can be viewed by clicking the lock icon within the browser window.

Programs that open CRT files
Windows
Microsoft Internet Explorer
Mozilla Firefox
Google Chrome
Other Web browser
Mac
Apple Safari
Mozilla Firefox
Google Chrome
Other Web browser
Linux
Mozilla Firefox
Other Web browser
Updated 6/13/2009