SSL certificate checker
Free SSL checker for any website. Test your certificate's expiry date, issuer, chain of trust, and TLS version and cipher, as seen from 300+ locations around the world
Unlock the full report
30-day free trial · cancel anytime
- {{ plan.maxTaskCount == null ? 'Unlimited' : plan.maxTaskCount }} monitored sites
- All check locations in the report
- TLS, headers & timing details
- Scheduled reports
- REST API access
What our SSL checker tests
We check your certificate's expiry date, issuer, subject and alternative names, chain of trust, and the negotiated TLS protocol and cipher.
Find out moreWhy checking from many locations matters
A CDN, load balancer or reverse proxy can serve a different certificate to different regions, so a single-location check can miss a problem your other visitors are already seeing.
Find out moreA check tells you today. Monitoring tells you before it's a problem
This is a one-time result. Set up SSL certificate monitoring to get alerted automatically 30, 7 and 1 day before your certificate expires.
Find out moreA one-time check only tells you today's status Set up SSL certificate monitoring
Key takeaways
- This tool makes an HTTPS request to the host you enter with strict TLS (Transport Layer Security) validation and reports the certificate's expiry date, its issuer, its chain, the protocol version and the cipher in use.
- Strict validation means a broken chain, a hostname mismatch or a revoked certificate is reported rather than tolerated, which is what a browser will do to your visitors.
- The check runs from more than 300 HostTracker locations, so a certificate served correctly by one edge node and wrongly by another is visible.
- It is free, needs no login and no credit card.
- For continuous checks, see the SSL certificate monitoring page, which warns 30 days, 7 days and 1 day before expiry.
Part of HostTracker's website monitoring software.