.CRT File Extension

Security Certificate

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What is a CRT file?

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.

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Programs that open or reference CRT files

Verified by FileInfo.com

The FileInfo.com team has independently researched the Security Certificate file format and Mac, Windows, and Linux apps listed on this page. Our goal is 100% accuracy and we only publish information about file types that we have verified.

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