A project dear to its heart, Let's Encrypt has now made wildcard certificate support live in the next step to encrypt the Web. The certificate authority, which offers free SSL and TLS certificates to webmasters, said this week that support is now live for wildcard certificates, alongside ACMEv2.
First announced back in 2017, Let's Encrypt "wildcard" certificates are free certificates for HTTPS deployment. The wildcards act in the same way as traditional TLS certificates but can be used to secure a domain and unlimited sub-domains on a single certificate, making deployment quicker.