~/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