~/tools / ssl-checker

SSL Checker

Check SSL certificate expiry, chain validity, TLS version and cipher. Catches expired certs, weak crypto and chain issues.

>
[ OK ] Valid for 87 more days.
── output ─────
Issued to
stackoverflow.com
Issued by
E7
Valid from
2026-04-19
Valid until
2026-07-18 (87 days)
TLS version
TLSv1.3
Cipher
TLS_AES_256_GCM_SHA384
Key
EC (prime256v1) · 256 bit
Signature
ecdsa-with-SHA384
Forward secrecy
yes
Self-signed
no
Must-staple
no
SHA-256 fingerprint
BA:80:7E:20:19:7D:99:AE:9D:0E:36:00:D2:BB:20:7F:72:96:51:9F:D3:D7:43:C2:80:E5:82:A0:A8:BF:70:68
Serial
068B9728525592CDF2FBDA8DC592EDF391EA
subject_alt_names · 2
*.stackoverflow.com stackoverflow.com
certificate_chain · 2 certs
[ leaf ]stackoverflow.com
87 days left
issuer: E7
2026-04-19 → 2026-07-18
[ inter ]E7
325 days left
issuer: ISRG Root X1
2024-03-13 → 2027-03-12
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