Convert Your DER Files to PEM

Swap your DER-encoded (and .der extension) files to PEM (.pem) format instantly. With our client-side conversion tool, your files never leave your browser, so you never have to worry about sensitive files being sent to our server.

Use Our Browser-Based Certificate Converter

Upload DER File (.der, .cer, .key, .crt, .txt) *

OpenSSL/Bash (Linux/Unix): Convert DER to PEM

Customize the following terminal command (using your unique file names and input file extensions) to convert your DER-encoded certificate files to PEM.

Certificate File (.der → .pem)

Private Key File (.der → .pem)

CSR File (.der → .pem)

Only one file type can be selected at a time.

OpenSSL/Bash (Linux/Unix) Command:

openssl x509 -inform DER -in certificate.der -out certificate.pem