What this SSL checker shows you
When you check SSL certificate details for a site, the two questions that matter most are "is it valid right now?" and "when does it expire?" This tool reads the certificate directly from the server and answers both — showing the exact SSL expiry date, the days remaining, who issued it, and whether it's currently valid, expired, or self-signed. Because it reads the live certificate rather than guessing, an expired or misconfigured certificate shows up immediately.
Two expiry dates, one page
A common and costly mix-up is confusing two completely different deadlines. The SSL certificate expiry is when the encryption certificate needs renewing (often every 90 days for free certificates like Let's Encrypt). The domain registration expiry is when you'd lose the domain name itself if you don't renew it (typically annual). They're unrelated, run on different clocks, and each causes a different kind of outage — an expired SSL certificate throws browser security warnings, while an expired domain registration can take the whole site offline. This checker shows both countdowns side by side so nothing sneaks up on you.
Why SSL certificates expire (and how to check expiry)
Certificates are issued for a fixed period and must be renewed before they lapse. Modern certificates have short lifespans by design — a security measure — which means renewal comes around often, and it's easy to miss if it isn't automated. To check an SSL certificate's expiry date, enter the domain above; the tool reads the certificate the server is currently presenting and reports its exact validity window. If you run the site, checking periodically (or automating renewal) is the reliable way to avoid the browser "your connection is not private" warning that an expired certificate triggers.