Step-by-step fixes and checklists for SSL certificates: what an error means, how to fix it, and how to keep it from happening again.
What each browser certificate error means (expired, wrong name, untrusted, revoked, protocol) and the exact steps to fix it on your website.
ChromeFirefoxSafariEdgeNginxApache
7 min read · Updated
Certificate lifetimes drop to 200, 100 and then 47 days by 2029. What changes when, and a step-by-step checklist to automate and monitor renewals.
All public SSL/TLS certificatesACMELet's EncryptCommercial CAs
6 min read · Updated
Looking for background? The blog explains how SSL certificates work.