This tool connects to any domain over HTTPS and reads its live SSL certificate — who issued it, when it expires, how many days are left, and whether it correctly covers the domain. An expired or misconfigured certificate breaks trust and tanks conversions.
What is SSL Certificate Checker?
An SSL checker verifies that a website's security certificate is valid, correctly installed, and not expired. A broken certificate throws scary browser warnings that drive visitors away instantly — this catches problems before they cost you traffic.
How it works
SSL/TLS certificates encrypt the connection between a browser and your site (the padlock and HTTPS). The checker inspects a domain's certificate for validity, expiry date, issuer, and correct installation across the chain.
How to use this tool
Enter a domain. The tool reports whether the SSL certificate is valid, when it expires, and whether it's properly installed — so you can renew or fix it before visitors see a warning.
Why it matters
An expired or misconfigured certificate makes browsers block your site with a full-page security warning — catastrophic for conversions and trust. HTTPS is also a Google ranking signal, so a broken certificate hurts twice.
Frequently asked questions
Why does my site say 'not secure'?
Usually a missing, expired, or misconfigured SSL certificate. The checker pinpoints which, so you can renew or reinstall it.
Does SSL affect SEO?
Yes — HTTPS is a confirmed Google ranking signal, and a broken certificate can block visitors entirely, indirectly crushing performance.
How often do SSL certificates expire?
Commonly every 90 days to a year depending on the provider. Many hosts auto-renew, but checking prevents nasty surprises.