SSL Checker
Free SSL Checker
Run a live TLS handshake against any domain to inspect certificate validity, expiry date, issuing CA and key strength.
SSL Checker
Inspect the live certificate, issuer, validity window, TLS version and chain.
Enter a domain above to run a real, live check.
Capabilities
What it checks
Expiry date
Days remaining before the certificate expires.
Issuing CA
The certificate authority that issued the cert.
Key strength
Key algorithm and bit length in use.
Chain of trust
Full certificate chain returned during the handshake.
Why use it
Benefits
- Catch an expiring certificate before it takes a production site down.
- Verify a renewal actually deployed correctly.
- Audit key strength and CA on domains you don't control.
FAQ
Frequently Asked Questions
Certificate validity window, issuing CA, key strength, and chain-of-trust — a live TLS handshake against the domain you enter.