Windows example of converting a Tomcat SSL certificate to Apache :
keytool -storepass 123 -keystore noodle.pfx -export -alias domain.tld -rfc -file cert.pem keytool -storepass 123 -keystore noodle.pfx -export -alias root -rfc -file fullchain.pem openssl pkcs12 -in noodle.pfx -nocerts -nodes > privkey.pem