> Type "download letsencrypt certificate online" in the Google > generate key online, provide me this service with sane implementation on a safe website Well

> Type "download letsencrypt certificate online" in the Google > generate key online, provide me this service with sane implementation on a safe website Well there's your problem right there. Either go on youtube and watch some videos about how TLS works or just use an http server like Caddy that automatically generates TLS certs and renews them with Let's Encrypt.