SSL certificate status
Check whether a valid SSL/TLS certificate is installed.
100% Free • No Signup • Live SSL
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SSL Checker
Check your SSL certificate, expiry date, issuer, HTTPS status and website security configuration.
Related checks: Review CAA records, HTTP headers, domain health and WHOIS.
Free SSL check • Live HTTPS • No signup
Connects to port 443 and inspects the live TLS certificate.
Why SSL certificate health matters
Browsers and visitors rely on valid HTTPS certificates to trust your website. An expired, mismatched or missing certificate triggers security warnings, blocks access and can hurt SEO — even when the site otherwise works over HTTP.
What this checker validates
One check reviews your SSL certificate, expiry date, issuer and HTTPS availability.
Expiry date
See when the certificate expires and how many days remain.
Domain match
Verify whether the certificate matches the checked domain.
HTTPS response
Check whether the website responds over HTTPS and HTTP redirects correctly.
Common SSL issues this tool can detect
Find SSL and HTTPS configuration problems that may affect trust, security or website access.
Certificate validity
- SSL certificate missing or not installed
- Certificate expired or expires soon
- Issuer unavailable or chain issues
Domain match & HTTPS
- Certificate does not match domain
- HTTPS connection failed
- Website not responding over HTTPS
Redirect & configuration
- HTTP does not redirect to HTTPS
- Mixed SSL/website response issues
- SAN or wildcard hostname gaps
Renewal & monitoring
- Expiry approaching without renewal plan
- Post-migration certificate not updated
- Periodic SSL health review needed
For CAA policy or security headers, use CAA Record Checker and HTTP Header Checker.
How SSL checking works
The checker connects to your domain over HTTPS and inspects the certificate.
Enter your domain
We normalize the hostname and connect on port 443 to inspect the TLS certificate.
Inspect SSL certificate
The tool checks the certificate issuer, validity dates, domain match and expiry status.
Review HTTPS setup
See HTTPS response, redirect behavior and recommended security improvements.
When to check SSL status
- Before launching a new website
- When certificate expiry approaches
- After server or hosting migration
- Following a security incident
- Periodic SSL health monitoring
- Before a compliance or security audit
Understanding SSL status
Valid
A valid certificate was found and the domain matches the certificate.
Expiring soon
The certificate is valid now, but should be renewed soon.
Expired
The certificate is no longer valid and browsers may show warnings.
Domain mismatch
The certificate does not match the checked hostname and should be fixed.
SSL protects the connection, but it does not replace a full website security check.
Preparing SSL check…
Need help fixing SSL or HTTPS?
Send us your domain report and we’ll review the issue.
Learn more: How to check SSL
Certificate details reflect a live TLS handshake. Browser trust may differ by client and chain configuration. How we check
Frequently asked questions
An SSL certificate helps secure the connection between a website and its visitors by enabling HTTPS.
A valid SSL certificate must be issued by a trusted certificate authority, match the domain and be within its validity period.
Browsers may show security warnings, and visitors may lose trust or be unable to access the website safely.
A mismatch happens when the certificate was issued for a different hostname than the one being checked.
It is strongly recommended. Without a redirect, users may still access the insecure HTTP version of the website.
No. The SSL Checker is free and does not require signup.