Certificates file extensions
Digital certificate and cryptographic trust files used for identity, signing, and secure connections.
Total extensions in this category: 3
Extensions in Certificates
Explore the most searched extensions in this category.
- .cer
CER Data File
.CER files are used for identity verification, encryption, signatures, and TLS trust chains. Open/import them with certificate managers or security tooling. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: application/pkix-cert.
- .crl
CRL Data File
.CRL files are used for identity verification, encryption, signatures, and TLS trust chains. Open/import them with certificate managers or security tooling. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: application/pkix-crl.
- .crt
CRT Data File
.CRT files are used for identity verification, encryption, signatures, and TLS trust chains. Open/import them with certificate managers or security tooling. This guide covers opening methods, troubleshooting, and security best practices. Common MIME type: application/x-x509-ca-cert.