SSL Checker
Verify SSL/TLS certificates via Certificate Transparency. Shows issuer, expiry, SAN, and certificate history. Free, no signup.
About this SSL Checker tool
CheckHub queries the public Certificate Transparency log (crt.sh) to display the latest certificate plus history, including issuer, validity, SAN, and serial.
How to use the SSL Checker
- Step 1. Enter a domain.
- Step 2. Read the latest certificate and its history.
Frequently asked questions
- What is Certificate Transparency?
- A public log every CA must publish to. It lets you discover all certificates ever issued for a domain — useful for spotting unauthorized issuance.
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