SSL certificate expiry checker
Enter a domain and see when its certificate expires, who issued it and whether browsers trust it. One secure handshake with the site, like a browser makes.
What the result shows
- The expiry date and the days left
- The issuer and the names it covers
- Whether browsers trust it, and why not if they do not
Read-only: the same lookups a browser or a mail server makes, nothing changed, nothing stored beyond ten minutes. What Stackbrace asks for.
What happens when an SSL certificate expires?
Browsers show visitors a full-page warning instead of the site, and most people leave. Anything that calls the site, such as a payment or a booking system, fails too. Email and the domain itself are unaffected.
Do certificates renew themselves?
Most do: free certificates from Let's Encrypt and the ones hosts issue renew automatically. They fail to renew when a site moves, a DNS record changes, or the host's automation breaks, which is why checking the date still matters.
How far ahead should I know?
Two weeks is enough to fix a renewal that has stopped working. Stackbrace tells you at 14, 7 and 1 days before a certificate lapses, and the moment one has.
Every day, not just today
Stackbrace checks every site's certificate every day and tells you 14, 7 and 1 days before it lapses. Start free with one site.