.CRT File Extension

Certificate File

A file with .crt extension is a security certificate file. It is used by secure websites for establishing secure connections from web server to a browser. Secure websites make it possible to secure da...

General Information

Title CRT File Extension
Extension .crt
Full Form Certificate File
File Type Security Certificate
Developer Various
MIME Type application/x-x509-ca-cert

File Function

Primary Function Store certificate
Additional Functions Secure communication, Authentication
Features Encoded, Signed

File Characteristics

Quality High encryption
Supports Layers N/A
Supports Transparency N/A
Editable No

Use Cases

HTTPS Websites Yes
Email Encryption Yes
System Authentication Yes

Security and Practices

Security Risks Theft, Misuse
Best Practices Secure storage, Regular updates

Historical/Version Information

Initial Release Varies
Latest Version Varies

Associated Types

Similar Extensions .pem, .cer, .key, .p12

Software Compatibility

Software Usage Policy OS Compatibility
Web Browsers Built-in Various
OpenSSL Free Windows, Mac, Linux
Keychain Access (Mac) Built-in Mac