Generate ACME Certificate

[tengfong00]

Is it possible to generate a acme certificate (acme.json) rather than .pem and .key file?

[AMEST]

Purely theoretically, it is possible to make an alternative output in acme.json. If it looks something like this (indicated below), then in principle all the data is there and such a file can be generated.

{
  "Account": {
    "Email": "your@emmail.com",
    "Registration": {
      "body": {
        "status": "valid",
        "contact": [
          "mailto:your@emmail.com"
        ]
      },
      "uri": "https://acme-v02.api.letsencrypt.org/acme/acct/XXXX"
    },
    "PrivateKey": "xxxx",
    "KeyType": "2048"
  },
  "Certificates": [
    {
      "Domain": {
        "Main": "domain.com",
        "SANs": ["san.domain.com"]
      },
      "Certificate": "xxx",
      "Key": "xxx"
    }
  ],
  "HTTPChallenges": null,
  "TLSChallenges": {}
}

[tengfong00]

Got it, previously I wanted to use the free domain(.tk) to get a subdomain SSL wild card using Traefik. Traefik connects to the service provider (ex: Cloudflare) and generates the ACME Certificate. But since Cloudflare doesn't support free domain DNS records, I can't get the certificate. I thought I could generate an ACME Certificate on my own and get the job done. Nevertheless, I gave up to use the free domain and buy a domain to settle my issue. Thank you AMEST for helping me!