Let's Encryptの解約方法(2026年)
Let's Encryptのプランは$0.00/月から。7ステップのガイドに従って約15分でサブスクリプションを解約できます — 引き止めオファーを避けるコツ付き。
更新日: 2026年4月
Understand what cancellation means
Let's Encrypt is a free, non-profit Certificate Authority — there is no paid subscription, billing, or account portal to cancel. 'Cancelling' means stopping automatic certificate renewal on your server and optionally revoking existing certificates. All steps are performed via command line on your server, not through a website UI.
Identify your ACME client
Determine which client manages your certificates. The most common is Certbot (Linux/macOS). Others include acme.sh, win-acme (Windows), Caddy (built-in), or your hosting panel (cPanel, Plesk, DirectAdmin). The commands differ per client. Run 'certbot certificates' to list active certificates if using Certbot.
Stop automatic renewal (Certbot)
To disable auto-renewal for a specific domain with Certbot, edit the renewal config file at /etc/letsencrypt/renewal/yourdomain.com.conf and add 'autorenew = False' under the [renewalparams] section. Alternatively, to stop all renewals, disable the systemd timer: run 'sudo systemctl disable certbot.timer && sudo systemctl stop certbot.timer'. On older systems using cron, remove or comment out the certbot line in /etc/cron.d/certbot.
Delete the certificate (Certbot)
Run 'sudo certbot delete --cert-name yourdomain.com' and confirm when prompted. This removes the certificate files from /etc/letsencrypt/live/, /etc/letsencrypt/archive/, and the renewal config from /etc/letsencrypt/renewal/. You will no longer receive expiry reminder emails for that certificate.
Revoke the certificate (optional, security only)
Revocation is only necessary if your private key was compromised or exposed. Run 'sudo certbot revoke --cert-path /etc/letsencrypt/live/yourdomain.com/fullchain.pem' and follow prompts. For non-security reasons (just stopping use), revocation is unnecessary — you can simply let the certificate expire or delete it.
Update your web server configuration
After deleting the certificate, update your web server config to remove all SSL references pointing to /etc/letsencrypt/live/yourdomain.com/. For Nginx, remove or comment out the ssl_certificate and ssl_certificate_key lines. For Apache, remove SSLCertificateFile and SSLCertificateKeyFile directives. Restart the web server: 'sudo systemctl restart nginx' or 'sudo systemctl restart apache2'.
Deactivate your ACME account (optional)
If you want to formally deactivate your Let's Encrypt ACME account (not just stop using it), this must be done programmatically via the ACME API per RFC 8555. Most users simply delete local account files at /etc/letsencrypt/accounts/ instead. There is no website dashboard to deactivate accounts. Inactive accounts are ignored and do not cause any issues if left.
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