SSL Certificate Checker

It encrypts the connection between your visitors and your website, and proves the site really is yours. It is what puts the padlock in the address bar and the "s" in https.

Browsers show a full-page "Your connection is not private" warning and most visitors leave immediately. Online payments and forms stop working safely, and search rankings can drop.

Free Let's Encrypt certificates last 90 days and are normally renewed automatically every 60 days. Paid certificates are limited to about a year. Automatic renewal can silently fail, which is why checking matters.

The server should send both your certificate and the "intermediate" certificate that links it to a trusted authority. Desktop browsers often fill the gap themselves, but many phones and apps do not, and show a warning instead.

HTTP Strict Transport Security tells browsers to always use the secure version of your site, even if someone types or clicks an http:// link. It protects visitors on public Wi-Fi.

Yes. Google uses HTTPS as a ranking signal, and Chrome labels non-HTTPS pages "Not secure", which hurts trust and conversions.