A Certificate Signing Request (CSR) is encoded in Base-64. To unencode, use openssl command line tool:
openssl req -in server.csr -noout -text
What is in a CSR? Your Public Key along with identifying information: Company Name, City-State, Country Code (ISO), Email address, and such. Read more here. This simple concept is mysteriously rarely explained:
CSR = ( Public Key + Contact/ID info )
