Convert DER to PEM
Free online tool to convert DER encoded certificates, keys, and CSRs to PEM 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 DER file you want to convert (only one file type can be selected at a time):
openssl x509 -inform DER -in certificate.der -out certificate.pem
Note: This command converts a DER-encoded leaf certificate into a PEM-encoded base64 file.
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