SSL/TLS Checker
Check a host over HTTPS from your browser — SSL/TLS reachability (which proves the browser validated the certificate chain) plus public issuance history (issuer, expiry, cert count) via crt.sh. No cipher-suite or protocol-version scan: browsers do not expose handshakes.
How to Use the SSL/TLS Checker
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Frequently Asked Questions
What gets inspected?
HTTPS reachability (browser-validated chain) plus crt.sh issuance history: issuer, expiry dates, and cert count. No cipher suites or protocol versions.
Which findings are critical?
None are flagged — the tool reports reachability and history only. For weak-cipher grading, look up suite names in the TLS Cipher Checker.
Why do lookups leave the browser?
Reachability probes the target host and history queries crt.sh — both requests leave the browser by design. Results only, nothing stored to an account.
Is my scan target uploaded anywhere?
The hostname is sent to the probed host and to crt.sh to fetch history; free with no signup, nothing saved to an account.
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Last updated October 2026