Check SSL certificate details for any domain. View expiry date, issuer, common name, valid period, days left, SAN domains, domain match, and overall certificate status.
Useful for website owners, developers, SEO teams, hosting migration, SSL renewal, and uptime checks.
Enter a domain name and check whether its SSL certificate is valid, expired, expiring soon, or mismatched.
An SSL certificate checker helps you verify whether your website HTTPS certificate is active, trusted, valid, and not close to expiry.
Find the exact SSL expiry date and see how many days are left before the certificate expires.
Check which certificate authority issued the SSL certificate and what signature type is used.
Confirm whether the certificate common name or SAN list matches the domain you entered.
An SSL certificate checker is a tool that connects to a website over HTTPS and reads the certificate information served by the domain. It helps confirm whether the certificate is valid, expired, expiring soon, or mismatched.
Website owners use SSL checks to avoid browser security warnings, payment page issues, login problems, and trust loss. Regular SSL monitoring is important for blogs, business websites, ecommerce stores, SaaS platforms, and client websites.
| SSL Field | Meaning | Why It Matters |
|---|---|---|
| Valid From | Certificate start date | Shows when SSL became active |
| Valid To | Certificate expiry date | Helps renew before expiry |
| Issuer | Certificate authority | Shows who issued the SSL |
| Common Name | Main certificate domain | Helps check domain match |
| SAN Names | Extra covered domains | Useful for www and subdomains |
Check an SSL certificate in three simple steps.
Type a domain name such as example.com. The tool automatically removes http, https, and URL paths.
The tool connects to the domain on HTTPS port 443 and captures the SSL certificate.
Check expiry, issuer, valid dates, common name, SAN domains, domain match, and SSL status.
Common questions about SSL certificates, HTTPS security, and server requirements.