Check an SSL Certificate
Enter a domain to instantly check its SSL certificate — issuer, validity period, expiry date, and whether the certificate chain is trusted.
What does checking an SSL certificate show?
Our checker connects to the domain over HTTPS and reads the certificate it presents: the organization it was issued to, the certificate authority that issued it, the valid-from and valid-to dates, the domains it covers (SANs), the signature algorithm, and whether the full chain of trust validates in modern browsers.
Why check your SSL certificate regularly?
Certificates expire, get misconfigured during deployments, or fail to cover every subdomain. A quick check confirms visitors will not hit security warnings — and a free SSLRadar account lets you check continuously instead of manually.
Frequently asked questions
Is this SSL certificate checker free?
Yes. You can check any public domain for free, with no account or installation required.
Can I monitor certificates automatically?
Yes — create a free account to monitor up to 100 domains and get email alerts before any certificate expires.
Monitor your certificates automatically
Create a free account to monitor up to 100 domains and get email alerts before any certificate expires.
Start monitoring free