SSL Certificate Checker
Verify SSL/TLS certificates and security ratings
About the SSL Certificate Checker
An expired or misconfigured SSL certificate breaks trust instantly — browsers throw warnings and visitors flee. This checker analyzes a domain's certificate and TLS setup through the respected SSL Labs service, returning an overall security grade plus the certificate's issuer, validity dates, and how many days remain before it expires.
Site owners use it to catch a certificate before it lapses, developers verify a new deployment's HTTPS, and security-minded users check that a site is properly protected. The letter grade gives an at-a-glance verdict, while the expiry countdown — color-coded as it approaches — is the detail that prevents the dreaded surprise outage.
Because the analysis is performed by the SSL Labs API, the domain you check is sent to that service, and a fresh scan can take a few moments to complete.
How to Use the SSL Certificate Checker
- Enter the domain name you want to check.
- Click Check SSL.
- If the analysis is still running, wait a few seconds and try again — fresh scans take a moment.
- Read the grade, issuer, validity dates, days until expiry, and protocol, then copy the summary.
Why Use ToolForge’s SSL Certificate Checker
- It surfaces a full SSL Labs grade, the same in-depth analysis security professionals rely on, rather than a simple valid/invalid check.
- The days-until-expiry figure is color-coded (red under 30 days, amber under 90), so a looming renewal is impossible to miss.
- It reports the issuer, subject, validity window, and protocol together for a complete certificate picture.
- It is free and needs no sign-up; note the domain is analyzed via the SSL Labs API rather than in your browser.
Frequently Asked Questions
What does the SSL grade mean?
The grade (from A down to F) summarizes the strength of a site's certificate and TLS configuration — protocol versions, cipher strength, and known vulnerabilities. An A means a well-configured, secure setup; lower grades flag weaknesses worth fixing.
Why does the check sometimes say "analysis in progress"?
A fresh, thorough scan of a server takes time. When the SSL Labs service is still analyzing, the tool reports that it is in progress; wait a few seconds and check again to get the completed results.
How early should I renew my certificate?
Renew well before expiry — ideally a couple of weeks ahead — to avoid any gap. The color-coded countdown here warns you as the date nears, with red signaling under 30 days, the point at which renewal becomes urgent.
Is the domain I check kept private?
The analysis is carried out by the external SSL Labs service, so the domain name is sent there to be scanned. That is necessary because a real TLS handshake cannot be performed from within your browser; the tool itself does not retain your queries.
