TinyCA is a simple GUI written in Perl/Tk to manage a small certification authority. It is based on OpenSSL and Perl modules from the OpenCA project. TinyCA lets you manage x509 certificates. It is possible to export data in PEM or DER format for use with servers, as PKCS#12 for use with clients, or as S/MIME certificates for use with email programs. It is also possible to import your own PKCS#10 requests and generate certificates from them.