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SSL Checker — Free TLS Grade Online
Free SSL checker online — test SSL certificate validity, TLS grade, HTTPS chain trust, and cipher strength on any domain. Instant A+ to F results, no signup.
- SSL certificate validity and expiry
- TLS grade A+ to F
- Cipher strength
- HTTPS chain trust
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Certificate Validity
Verify that your SSL certificate is valid, properly issued, and not expired.
Expiration Alerts
Get alerts about upcoming certificate expiration to prevent downtime.
Chain Verification
Ensure your certificate chain is complete and properly configured.
Security Analysis
Get a security grade and recommendations to improve your SSL configuration.
Frequently Asked Questions
An SSL checker is a free online test of the TLS certificate and HTTPS configuration a website serves. Vulnify grades certificate validity, expiry, chain trust, protocol support, and cipher strength from the public edge — no signup for Quick Check.