Convert PEM to DER
Free online tool to convert PEM encoded certificates, keys, and CSRs to DER (binary) format using our browser-based tool or OpenSSL/Bash (Linux/Unix) commands.
Convert Online (Browser-Based)
Convert Using OpenSSL/Bash (Linux/Unix)
Select the type of PEM file you want to convert (only one file type can be selected at a time):
openssl x509 -outform DER -in certificate.pem -out certificate.der
Note: This command converts a PEM-encoded leaf certificate into a DER-encoded binary file.
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