Tool to help generate DNS CAA record for SSL certs

https://tools.ietf.org/html/rfc6844 :

"The Certification Authority Authorization (CAA) DNS Resource Record allows a DNS domain name holder to specify one or more Certification Authorities (CAs) authorized to issue certificates for that domain."

This tool is provided by sslmate, but works regardless of which CA and which DNS provider you are using. It shows you exactly what records to add to your DNS based on simple html form.