Free SSL Certificate Checker
Verify any site's SSL/TLS certificate — validity, expiry, issuer, cipher strength and the full chain — in one quick, free check.
An expired or misconfigured SSL certificate breaks trust instantly — browsers show a scary warning and visitors leave. The siteIQ SSL Checker verifies any site's certificate so you catch problems before your users do.
Enter a URL to see the certificate's validity, expiry date, issuer, encryption strength and whether the full chain is correctly installed.
What this tool checks
Validity & status
Whether the certificate is currently valid and trusted.
Expiry date
Exactly when it expires — so you can renew before it lapses.
Issuer & type
Who issued it (CA) and the certificate type.
Cipher & protocol
TLS version and encryption strength in use.
Certificate chain
That intermediate certificates are correctly installed.
Why it matters
HTTPS is a baseline ranking signal and a hard trust requirement — a certificate error turns visitors away at the door and can take a site effectively offline for cautious users.
Certificates expire on a schedule, and a forgotten renewal is one of the most common, most avoidable outages. A quick check protects both your traffic and your reputation.
How to read your results
- If expiry is near, renew now — don't wait for the last day.
- If the chain is incomplete, install the intermediate certificate your CA provides; some browsers fail silently otherwise.
- Aim for a modern TLS version (1.2+) and a strong cipher; flag anything outdated.
- Make sure the certificate covers the exact domain (and www / subdomains) you serve.
Frequently asked questions
What does SSL/TLS actually do?
It encrypts the connection between a visitor's browser and your server, so data can't be read or tampered with in transit. It's what puts the padlock and 'https' in the address bar.
How often should I check my SSL?
Set a renewal reminder, but a periodic check is wise — especially if you don't use auto-renewal. Many free certificates last only 90 days.
My site shows 'Not Secure' — why?
Either there's no certificate, it's expired, the domain doesn't match, or the page loads insecure (HTTP) resources. The checker will tell you which.
Is a free SSL certificate good enough?
Yes — free certificates (e.g. Let's Encrypt) provide the same encryption as paid ones for most sites. The key is keeping them valid and properly installed.
HTTPS and SSL Explained →
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