.CRT or .CER - File Extension for Security Certificate Files
What is CRT or CER? CRT or CER, short name for Certificate, is used as the file extension for PKI (Public Key Infrastructure) Security Certificate files. .CRT or .CER files are Base64 encoded text files. See the sample .CRT file included below.
File Extension: .CRT
MIME Type: application/x-x509-ca-cert, application/pkix-cert
File Content: Security Certificate
.CRT or .CER files are Security Certificate files. A .CRT or CER file contains a public key digitally signed by a trusted entity. Here is a sample .CRT Security Certificate file containing Yahoo's public key signed by usertrust.com:
-----BEGIN CERTIFICATE----- MIIF7zCCBNegAwIBAgIRANdVj9r18RBbshMoK3B3KaMwDQYJKoZIhvcNAQEFBQAw gZcxCzAJBgNVBAYTAlVTMQswCQYDVQQIEwJVVDEXMBUGA1UEBxMOU2FsdCBMYWtl IENpdHkxHjAcBgNVBAoTFVRoZSBVU0VSVFJVU1QgTmV0d29yazEhMB8GA1UECxMY aHR0cDovL3d3dy51c2VydHJ1c3QuY29tMR8wHQYDVQQDExZVVE4tVVNFUkZpcnN0 LUhhcmR3YXJlMB4XDTExMDMxNTAwMDAwMFoXDTE0MDMxNDIzNTk1OVowgd8xCzAJ BgNVBAYTAlVTMQ4wDAYDVQQREwUzODQ3NzEQMA4GA1UECBMHRmxvcmlkYTEQMA4G A1UEBxMHRW5nbGlzaDEXMBUGA1UECRMOU2VhIFZpbGxhZ2UgMTAxFDASBgNVBAoT C0dvb2dsZSBMdGQuMRMwEQYDVQQLEwpUZWNoIERlcHQuMSgwJgYDVQQLEx9Ib3N0 ... -----END CERTIFICATE-----
.CRT or CER Security Certificate file sample: Click sample.crt to download.
.CRT or CER files can be created and opened by these software:
2020-04-08, 37677👍, 13💬
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