SSL/TLS Diagnostic Troubleshooter

Diagnose SSL/TLS connection problems systematically. Interactive troubleshooter for common issues.

Interactive Demo

Start here when things break

What are you experiencing?

Check certificate details

openssl s_client -connect example.com:443 2>/dev/null | openssl x509 -noout -text

Check expiry date

openssl s_client -connect example.com:443 2>/dev/null | openssl x509 -noout -enddate

Show full chain

openssl s_client -connect example.com:443 -showcerts

Test TLS 1.2

openssl s_client -connect example.com:443 -tls1_2

Test TLS 1.3

openssl s_client -connect example.com:443 -tls1_3

curl verbose

curl -v https://example.com